For images: https://www.google.co.in/search?hl=en&cp=7&gs_id=q&xhr=t&q=powerpivot&bav=on.2,or.r_gc.r_pw.r_cp.r_qf.,cf.osb&biw=1366&bih=642&wrapid=tljp1340358461134010&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=OT_kT-aaK4r3rQeh393rCA
For content: http://www.microsoft.com/en-us/bi/powerpivot.aspx
Please vote as helpful or mark as answer, if it helps
Cheers, Raunak | t: @raunakjhawar | My Blog
Can you see if this helps you?
There are plenty of tutorials and presentations online (you could try the SQLSaturday sites also, usually there would be atleast one PowerPivot session in any event and most of the presentations are uploaded in the site).
P.S. : Please click the 'Mark as Answer' button if a post solves your problem! :)