As Mozilla moves Firefox towards a 3.0 release, projects based around it are also in the process of updating. Flock, the "Social" web browser based upon Firefox technology, is capitalizing on this and has announced the release of the Flock 2.0 Beta. The beta has several enhancements over the current release of Flock, many of which are directly related to the technology update of its base.
They cite improvements such as quicker page rendering, reduced memory consumption and smoother execution of web apps, like Gmail. They also make mention of security improvements and an improved download manager and favorites manager. Not a terrible lot is changed from earlier versions of Flock itself, but at the very least users will be able to keep step with Firefox 3 users. You can read the full press release in the comments section.