Along with the CTP3/beta2 bits that were pushed today, we have also released the Books-On-Line CTP3 documentation for PowerPivot for SharePoint. I will do a few postings in a bit with the critical portions of BOL that I think that everyone should know about, but for the time being, it is great to just get the BOL information out there. They can be located at: http://msdn.microsoft.com/en-us/library/ee210682(SQL.105).aspx
Enjoy.
