Im up in Denver, spending the day with the JDE folks so its a quick post today. There are a couple of interesting documents just posted to the BIP home page that you might find useful.
The first is a guide on how to migrate from Crystal to BIP, authored by Pradeep and Mike from the PM team - Converting Crystal Reports to BI Publisher Its a manual process but at least shows that it can be done with a little effort. The steps are laid out very nicely and should be easy enough to follow for those of you migrating from Crystal. A more automated approach is under discussion.
The second is Integrating BI Publisher with Oracle Forms - I have mentioned this paper before by Jurgen and Rainer in our German office but the paper has been updated since. Its a good intro the web services we support and then how those can be called from Oracle Forms. Well worth checking out - if you're looking for Forms integration of course.