Why only customers can use Web2.0 applications? And the Developers? Ok, We have access to Gmail, Flick, box.net, a lot of really cool geeks apps, but we can turn our JavaDocs, much more impressive then we have nowdays.To do that use Docwrench Doclet (http://www.docwrench.com/). The Following Image shows how look your future Docs:

Reading this site, I think it is an evaluation, but it would be great if could be free, and maybe to integrante as a plugin in Maven2.