In Safari on OS X, you can view all RSS feeds from a folder together in one feed. Sadly, this feature is missing from Safari on the iPhone. If you want to regain this functionality, all you have to do is open Safari on your desktop, open all the feeds together, and then add that newly-created page to your bookmarks, then sync. Now you can view all your feeds in one go!
Mac OS X Hints
http://hints.macworld.com/article.php?story=20071208002140538