Thomas Joscelyn touched on this on his site
http://thomasjoscelyn.blogspot.com/ and I linked to him on this topic
http://mgraves.townhall.com/g/445d3e43-bc63-473f-bce1-932ac64a9a87.Stephan Hayes has published extensively on this topic (in The Weekly Standard) and Yossef Bodansky discussed the relationship in detail, some years prior to 9/11 (Bin Ladin: The man who declared war on America). Gunaratna discounts an Iraq-AQ connection, but not for the usual tripe that masquerades as reason in most media (Inside Al Qaida).
Hammer away...but from personal experience, be prepared to accept derision from the willfully ignorant and the intentionally blind.