Maxthon has been my primary browser for almost two years now and it is still my favorite.  There is nothing I've found in IE7 or Firefox that has made me switch.  I know, I stick out like a sore thumb in the developer community.  :-)

Anywho, the first beta release (build 2.0.1.1276) of the new Maxthon2 browser is now out and it works both the IE6 and IE7 engines.  I've been using the pre-beta's for the last 3 weeks and I really enjoy the experience.  As Dave mentioned, I need to write up a review on it. 

Download the beta here.