Bumped into this very interesting guide yesterday and I believe this would be an essential guide for those who are looking into creating custom reports for SCCM. The one I like the most is there documentation of the SCCM DB Schema altogether. Well not I can't see it from SQL Server, but now we have a documented description of the Database Schema altogether.
Interested? Get it from this link
http://www.microsoft.com/downloads/details.aspx?FamilyId=87BBE64E-5439-4FC8-BECC-DEB372A40F4A&displaylang=en
OR you can get it from my SkyDrive in case that link no longer valid.
http://cid-8b468d6e5c4e0782.skydrive.live.com/self.aspx/Public/CreatingCustomReportsByUsingSQLViews.msi
