[jeffhbo]

I use "Folders Organizer" to change icons. You can download a free version from the market and you can find iphone icon sets on XDA. Move the icon set to your SD card.

1. open folder organizer
2. Select apps
3. Find the app that you want to change the icon for
4.Click the arrow on the right side of the listed app
5. Select the icon tab
6. Select Image Gallery and hit OK
7. Select the icon folder that you previously downloaded
8. Select the icon you want to use for the app
9. Press and hold the desired area of the home screen
10. Select Shortcut> Then Select FolderOrganizer item> Then Select Apps> Then
Select the app that's icon you just changed

At this point there should be a app shortcut with the new icon on your homescreen.
This method only changes the program icons on your home screen and icons in the Folder Organizer program. Its the best method currently available, that i know of.