I just surfed on this product called SAIKU is a modular open-source analysis suite offering lightweight OLAP which remains easily embeddable, extendable and configurable. http://analytical-labs.com/ and i must say it rocks its front end is Jquery :) I have just stepped through the demo but i would be giving it a test soon. Go for it Cheers...
Surfed through this Sharepoint ebooks. **Good as a reference and its update monthly Enjoy