A List Apart just published a well done article summarizing the current state of smartphone web browsers. It's definitely worth reading and referring back to when doing your browser testing.
Mobile Awesomeness Blog
Designing and Developing Web Technologies on the Mobile Web.
Monday November 1, 2010
A few weeks ago, Mozilla finally released the beta version of Firefox for mobile devices (codenamed "Fennec"). The initial roll-out supports Nokia N900 devices and Android devices running version 2 and up. The desktop simulator is available for OS X, Windows and Linux (available on the same page). The browser is based on Firefox 4 for the desktop, using Gecko version 1.9.2.
Posted in Browsers