In order to get ‘power users’ to flock to Opera they decided to release weekly builds of Opera 9. The most current release is Opera 9 Build 8219 for the PC and Build 3224 for the Mac. On their homepage they also offer a changelog to let users know what has been fixed in the current build. This may be a smart move for Opera, but from my experience with Opera 9 it will not be pulling people away from Firefox. The only cool thing that Opera 9 has is BitTorrent functionality built in, but Firefox will soon have an extension for that.