I read over at Slashdot that Mozilla has updated the Firefox roadmap. The Firefox team decided to skip Firefox 1.1, which already reached Alpha 2) and move directly to Firefox 1.5 due to the significant number of bux fixes and changes.
A feature complete beta version of Firefox 1.5 is expected in August.
"We are planning for a Firefox 2.0 and 3.0, but will divide the planned work over (at this point) three major Milestones, 1.5 (September 2005), 2.0 (unscheduled) and 3.0 (unscheduled). All major development work will be done on the Mozilla trunk, and these releases will coincide with Gecko version revs."