All,
Some time ago, I mentioned on this mailing list that I'm writing an RHQ plug-in to monitor WebSphere Application Server instances. That plug-in was originally developed for my work, but the customer agreed to release it as Open Source under the GPL. The source code has been migrated to Google Code and I've recently released version 1.0.0 of the plug-in. Here is the link to the project:
http://code.google.com/p/rhq-websphere-plugin/
The plug-in focuses on monitoring as well as managing the runtime state of WebSphere servers; it doesn't contain any features to manage the WebSphere configuration.
Note that the choice of Google Code to host the code was motivated by practical reasons. Once the migration of the RHQ project to Github is completed, and if there is interest, we can move the WebSphere plug-in to Github as well.
Regards,
Andreas