A few new things they have so far (that I love!) is the: inline spell-check, auto-update, and the fact that it passes the Acid 3 test. It feels more responsive on gmail and google calendar.
I really like the inline spell checker. It's the one thing that I have had inconsistent trouble with from computer to computer using Opera on Ubuntu, but now it looks like that might not be the case.
http://www.opera.com/browser/next/
NOTE:
Please do not download and use it as your main browser. As with any alpha, beta or release candidates it is NOT RECOMMENDED to use on a every-day basis. It is meant for testing purposes only.
Edited by yano, 08 December 2008 - 10:37 PM.