On Integral Theory and it's progenitors.  I particularly like the quick listing of various thinkers in integral, and I hope to add more soon. 

Also, this was posted by M. Alan Kazlev, who maintains kheper.net, which has a smorgasbord of goodies.  In terms of adding content, he is the man, just look at recent changes. 

You go Alan!  (UPDATE:  You'll need to scroll down a bit, as Goethean has responded to my earlier hopes  (Yes!)