You all know that the latest Safari better supports resuming transfers and stuff, and you end up with a .download file that shows the download progress. But did you know that you can control-click this file to show its contents? Control-click and select Show Package Contents from the pop-up and you'll see an info.plist file along with the file being downloaded.
If you are downloading a movie or MP3 for example, you can access the partially downloaded file. Very useful for large movies or songs that you just can't wait to view!
[robg adds: I'll admit that I don't see much benefit to this hint, given that you'll end up waiting for the whole file anyway, and I doubt it would work for partial disk image downloads. However, I thought the concept was at least interesting enough to merit posting.]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20040429201904205