First the good news: I have finally wrapped up the Jasper Reports Integration package and made it available for download.
It is in beta quality and needs some more testing (of the code and documentation) before it should be used in production. Once it hits the first production release, the interface packages should remain stable. Until then they might change with the later beta releases.
Everybody who wants to join the beta program is more than welcome! Any feedback is welcome.
You can get all the files, infos about the architecture and the installation guides here.
Then, I really have to apologize for taking so long (I had promised to release it much earlier) and not responding to many of the emails I have received. I am really sorry for that but my life has gone haywire in the last year - and I am still recovering from that.
Update on 04.09.2010: Version 220.127.116.11 is now available: http://daust.blogspot.com/2010/09/jasper-reports-integration-v1100.html