Notes/Domino 6 and 7 Forum : A few questions about J2EE with Domino

Hi,

We are in the process of migrating a big application from Domino to Notes(for back office, data container)/J2EE(for front office).
This application will mainly use servlets and perhaps JSP. We don't plan using EJB at that time.
After a few weeks of tests for this migration I have some questions without really good answers.

1) Is there a "best" solution between local and IIOP access. I understand that IIOP allows to split servers if we need to but does it bring performancer issues comparing to local access.

2) We've got a lot of Notes Object (databases and documents) to put in cache and used during all the application life by all the servlets and JSP (shared among them at application scope with the setAttribute and getAttribute methods of the servletContext class). Will it cause problems, since all those elements will depend of only one session and how to initialize properly those cached elements regarding NotesThread.sinitThread()and stermThread().

3) More generally is there a J2EE/Domino best practice guide out somewhere ? I found a lot of samples of building servlets using Domino object but nothing at the application scale with object sharing and so on.

Any help or clue would be very appreciated.

Thanks a lot