I am now (for nearly two weeks) invloved with Xdoclet as commiter. Xdoclet is a code generator, where you add tags in javadoc format to your source (@foo.bar). Xdoclet then generates Java files and deployment descriptors. Currently I am wading through JIRA, their trouble ticket tool. It's quite some work. But fortunately, you see a result.
I am also currently writing an article for iX magazine about Xdoclet. I submitted it to the editor two days ago in the afternoon, saying that it is not clear when there will be a next release. In the evening, there was a mail on the developers malingl list saying "hey, do we want to release this weekend?" :-)