Only available for iPhone and iPod Touch via the App Store for the time being, Android version coming soon.
Source – YouTube
Finally cut and paste is here, LOL. Well, what else is new? Apple also added spotlight search; shake to shuffle; notes sync; WiFi auto-login; voice memo; MMS and many more. Check out the following articles for more info, all good read.
Engadget’s article with some nice pics on the new OS, iPhone OS 3.0 hands-on!
Apple posts iPhone event video from MacWorld
and lastly, the official iPhone OS preview page where you can watch the presentation.