Not sure if anybody has suggested this yet but what about an AVForums Book Club.
So we pick a book, go out and read it and come back in a predefined period of time and discuss it.
Would require a seperate thread for each book (hint new forum, hint, apply hint with sledgehammer, hint) but could be interesting and fun.
A separate book forum has been mentioned a number times in similar threads, but the requirement is at least 100 members expressing the same interest, unfortunately, I don't think this number has been reached to date.
Just finished Prince of the Blood by Raymond E Feist so i'm now starting King's Buccaneer by the same author.
*cough* http://www.avforums.com/forums/general-chat/1066412-book-section-would-you-like-see-one-avforum.html data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7