VirtueDesktops, the virtual desktop manager of choice, recently updated to version 0.54 beta 2 with a major set of changes and bug fixes. This forum post at cocoaforge rounds up all the changes of a few recent builds, including this latest beta. To summarize: the main gist is a lot of focus on UI tweaks and improvements. Rearranging desktops, desktop inspector improvements, crash fixes and plugs for memory leaks are all on the table.
If you want to download the new version and are interested in the details, hit the forum post for everything you need to know. Otherwise the VirtueDesktops downloads page should do you just fine, but don't forget to donate to show your appreciation.