AspectJ 5 final is finally shipped.
This means that the merger with AspectWerkz is complete and that the most important chapter in the history of AOP has been completed (IMHO). Finally we have a standardized language and toolkit and can, both as developers and users, try to (finally) pull in the same direction. For more info, read Adrian Colyers' blog announcement or the release page.
Go ahead and download the stand alone compiler or the AJDT IDE toolkit (with an embedded compiler).
Time to have some fun.