If you're interested in writing a Forge plugin and looking for something easy and interesting to try first, give the Envers plugin a go. It's a perfect starter project!
Envers adds auditing support to JPA entities with one dependency and one annotation.
-Dan
p.s. Btw, this would make an excellent Forge plugin tutorial, so write down the steps in a gist while you are doing them [1], then you'll get two credits out of it, as a plugin author and tutorial author.
[1] https://gist.github.com <-- where all great documentation is born, a simple text file
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Dan Allen
Principal Software Engineer, Red Hat | Author of Seam in Action
Registered Linux User #231597