While reading the Mozilla blog, I learned that the Fennec Alpha 3 build has been released for Windows Mobile devices.
"We’re very happy to announce the availability of Fennec Alpha 3 for Windows Mobile. There are lots of great features and fixes included in this release. You can find the release notes here and a cab installer here. Personally, I’m turning off my iPhone to switch to a Windows Mobile device with Fennec."
Since the last release of Fennec for Windows Mobile, the Mozilla team has been working on improving the start up time for the mobile browser, they have improved panning, and they "now support a wider range of screen resolutions through the use of CSS media queries."
Just keep in mind that this is still an alpha version of the software and it will have some rough edges.
If you are not familiar with the Fennec project, you can learn more about it on the Mozilla website. If you are not familiar with fennec foxes (Fennec is the little brother of Firefox after all!), you can learn more about them from Wikipedia.