Mobile Firefox Fennec won’t launch until 2009, but an alpha version should be available soon:

“Mozilla’s mobile web browser, which is under development as part of Firefox 4 platform and code named Fennec, won’t launch until 2009. Still, the team is planning to release the first alpha version by the end of August and a viable beta by year’s end, according to Mozilla.org. Fennec is expected to reach another milestone on June 20 with the release of M4.”