Dave,
Couple of good resources to check below:
http://wiki.scn.sap.com/wiki/display/BOBJ/Business+Intelligence
SAP BusinessObjects BI 4.1 Supported Platforms (PAM)
http://wiki.scn.sap.com/wiki/display/BOBJ/Admin+Support+page
All you need to know before upgrading to BI4.0 - Business Intelligence (BusinessObjects) - SCN Wiki
http://wiki.scn.sap.com/wiki/display/BOBJ/BI4.0+Product+Support+page
Regards,
Ajay