We really want you to get involved in the Apollo and we love contributions. One of the easiest ways to get involved is to join the community discussions.
Apollo User List
This mailing list is end users to ask general questions about Apollo
Apollo Developer List
This mailing list is for contributor to discuss the bug fixes and and new features being developed for Apollo
Apollo Commits List
This mailing list get automatically notified when when the project source code gets updated.
You can also catch us on IRC to chat via the #activemq channel on the irc.codehaus.org server.
Keep up to date on the latest and greatest releases by following the Apollo Blog