iphone 3g - ios 4 new features list??

[silent1643]

upgraded my daughters 3g to the new 4.0 software and noticed some of the new features - but is there a list that shows what new features the 3g users will get?

[ianbroste]

What's supported

Folders
Threaded mail
iTunes playlist creation / editing
5x digital zoom: just tap on the display near the capture button, but be warned, it doesn't paint a pretty picture
iBooks: PDFs work, too.
Photos: you can now sort by albums, events, faces, and places
Game Center: the icon is present, but as of this writing we're unable to connect to the servers. (Update: a number of readers saying it didn't come with today's download. We nabbed ours as a gold build, which might explain the discrepancy despite still being considered "up to date" by iTunes.)
Spell check has been updated
Spotlight search: you can search the web and Wikipedia from the home screen search bar.

What isn't

Multitasking: this is the big one. Double-tapping the home button doesn't give you the handy menu, there's no fast app switching, and background use is missing in action.
Screen lock: normally in the multitasking menu (which isn't available on 3G), it's nowhere to be found, even under Settings. Bummer.
Home screen wallpaper: you'd think this simple addition would make the cut, but sadly no. The dock has been given a visual upgrade, though.
Bluetooth Keyboard support: we haven't tried this ourselves, but an influx of reports from Twitter suggest this is also a no-go.