Enhanced version of the CQWP from Ishai Sagi (Aus SharePoint MVP)
Ishai is mentioned at SharePoint Product team blog around all the interesting work he is doing with CQWP.
The source code and project is listed on CodePlex at http://www.codeplex.com/ECQWP. The enhanced version includes features such as context menus for the items, toolbar for lists, and much more that you can read about from the release log.
Ishai is ready to wrap up the development of the ECQWP and move on to something else, but he would like to get a few more testers to make sure that it's rock solid. So, if you're a frequent user of the CQWP, please try out Ishai's ECQWP and give him some feedback -- good or bad. Thanks!!!!