To quote a few, brand new UI design(i think it cooler), full screen browsing, support direct installation from .deb,.pxl,.ipa, support music(.3gp,.mp3) and movie(.mov,.mp4)) download and playback, last session restore…
I myself still haven’t enough time to digg deeper into it yet. To get more, you better try it out by yourself. Just give it some patience ‘coz it’s still in beta and buggy, from from as stable and user-friendly as Safari.
However, it IS worth of a try.
Cydia/Icy source is: http://wap.ucweb.com/iphone/cydia.
Compatible Firmwares: 2.0 | 2.0.1 | 2.0.2 | 2.1 | 2.2 | 2.2.1 | 3.0 | 3.0.1
Here’s the new home and a downloaded mp3 ready to play.
Update(Sep.28,2009): UCWEB 6.7 beta rocks on iPhone firmware 3.1!