Where can I find a ten year "P/E multiple" graph of the S&P 500?

Question

In other words, I want to see what the average P/E multiple is right now and compare it historically.

Answer 1

Several web pages with P/E ratio graphs of the S&P 500:

http://bigpicture.typepad.com/comments/2006/08/sp_500_versus_p.html
http://tickersense.typepad.com/ticker_sense/2006/06/sp_500_pe_ratio.html

No graph, but some annual S&P 500 metrics back to 1960:

http://pages.stern.nyu.edu/~adamodar/New_Home_Page/datafile/spearn.htm