There are two places I can think of that use "dots" to denote unseen pages or screens on the iPhone: in the Weather widget and in Safari's "pages" mode.
In the Weather widget, you can use horizontal area of the screen where the dots are as an alternative navigation method. While you 'swipe' the panels to move them out of the way, you can swipe the opposite direction in the dots area, swiping 'to' the direction you want to go. Alternately, you can also just tap to the left or right of the dots to move the weather panels in that direction.
I thought that same method might remain consistent in Safari, but it does not. However, in trying to get it to work, I did discover that instead of swiping from one page to another in Safari, tapping on the edge of the screen where you see the edges of other web pages will also allow you to move from one page to another.
Prepare your ringtones. I've only tried this with m4a files. Your mileage may vary. First, run your ringtone trough Ringtonator. You should now have both an m4a version, and an m4r version of your ringtone.
Load up iPhuc and add BOTH files (m4a and m4r) files to the /iTunes_Control » Ringtones directory. (using the putfile command).
You need to get the Ringtones.plist file from /iTunes_Control » iTunes using iPhuc and the getfile command. Save a copy of the file in case your make a mistake!
Then you'll need to edit the plist in the plist editor or your favorite text editor. You need to add two entries to the Ringtones dictionary, one for the m4a file and one for the m4r file. I made up the GUID myself, but I'm sure there's a better way to do this. However, note that the GUID is the same for both the m4a and m4r files. You can also edit the name key. You can see a sample ringtone file at the above linked blog post.
Put your modified version of your Ringtones.plist file back on your iPhone in the /iTunes_Control/iTunes directory.
That's it. Your ringtone should appear in your ringtones list.
I discovered that it is possible to type email, text messages, and enter text in most western languages. Simply tap and hold the button for the letter that most closely resembles the one you'd like to type. While holding the key down, an additional menu will appear where you can select the desired letter or accent.
For instance, to get an é, simply tap and hold E and select desired letter with accent from pop-up menu.
[robg adds: This feature was added with the iPhone 1.1.1 update, but as of now, it's not yet documented in the iPhone's user manual (which hasn't been updated for 1.1.1), nor anywhere that I can find on the iPhone support pages or even in the what's new video.]
Having used the iPhone for some testing, I saw that some SMSes corrupted the database file and the SMS app no longer worked. It would simply quit when I tried to open the SMS. The Apple suggested way to fix this problem would be to reset the iPhone by using the Settings » General » Reset » Erase all Content and Settings. But this would mean that you would have to resync your iPhone again. The easiest way I have found to do this is as follows.
Download any Terminal app from within the AppTap installer on the iPhone.
Open the terminal app and enter these commands:
$ rm Library/SMS/*
Note that you will lose all your saved SMS messages.
Exit the terminal app.
Restart your iPhone.
Your SMS app should now be as good as new while all your other data is intact.
[robg adds a very important note: This solution will possibly (a) void your warranty, (b) break the EULA, and (c) may have negative consequences with future Apple updates. If you've going to take this route, however, you could actually just use iNdependence to jailbreak the phone, and install dropbear (an SSH clone) at the same time (within iNdependence). Once that's done, you could use ssh (or sftp via Transmit, etc.) to connect to the phone and remove the bad file. Please consider the possible consequences above, however, before trying this solution -- anything that happens to your iPhone would be your responsibility, not anyone else's. Apple's Restor function is by far the safest, if most time consuming, solution.]
If you're on another Mac and want to sync a song/video to your iPhone, iTunes will clear your Music/Video Library. But the iPhone syncs Podcasts separately from the Music/Video Library, which means you can use Atomic Parsley to rewrite some flags on your songs/videos, and iTunes will sync the song/video as Podcasts without touching your Music/Video Library.
So, grab Atomic Parsley, and run it with these modifiers (URL and GUID can't be blank):
Now drag your song/video over to iTunes, and it'll show up as a Podcast and sync without touching your Library. Friendly note: The Podcast will show up by Artist metadata or podcastURL. This hint inspired by the methods covered in this one.
After an ill-advised (the site is somewhat dysfunctional even in desktop Safari) visit to a local book seller's web site on my iPhone crashed Safari, I found that I could no longer use Safari. Every time I opened it, it would be unresponsive for a few seconds, then crash, taking me back to the iPhone's home screen. Since Safari attempts to re-load the last visited site, it would attempt to reload the book seller's site upon launch and just crash again. Catch-22.
So I opened Mail, went to a message with a URL in the body and clicked that. That caused Safari to launch and open the URL passed by Mail. Problem solved!
I've been frustrated by the way we change the volume on the iPhone. The side button makes too large of a change, for my taste, with a single tap. But when I try to use the on-screen slider, I find I also have a hard time because my finger covers up the slider knob, so I can't see when I try to make small changes. I've discovered a way around this.
If you put your finger on the slider knob and start to move it, you can then move your finger (keep it in contact with the screen) quite far away -- I move my finger up into the main screen area -- and the slider will still move. Now I can make the small changes I want and watch the slider knob move without my finger blocking my view.
I'm often frustrated by the fact that the ".com" key exists for entering URLs, but not when entering an email address in a form on web pages.
Now instead of pressing the ".?123" key to get the period (.), I just hit the space bar twice followed by the delete key, then type com. I know it's the same number of taps, but this technique is certainly faster. Note that this will only work on iPhones that have been upgraded to version 1.1.1.
The headset that comes with iPhone allows you to use squeeze (click) once to pause, and double-squeeze to skip a song. But if you squeeze one time (while a song is playing), the iPhone's playback will pause, and if you then double-squeeze, the iPhone will skip back to the beginning of the album or playlist (depending on what you started playing).
Thus it is possible to skip back to the beginning without pulling the iPhone out of your pocket.