Not sure if this is viable, or even worth it, but I noticed on this thread:
http://www.tfproject.org/tfp/showthread.php?t=129465
That one thing which would be nice is a link to actually *buy* (or at least find more info on) the books people mention.
This led me to wonder about the amazon referrel program - if people posting books included an amazon link, with a "TFP Referrel" token, then anyone following the link and buying the book would cause a little cash to be thrown TFP's way.
http://affiliate-program.amazon.com/gp/associates/join
Mods could go back and add the properly formatted links to books that people don't link to.
On the other hand, people might not appreciate their posts being used as (essentially) an amazon.com ad with a kickback to TFP. I wouldn't mind, personally, as long as the fact were mentioned in the thread.
(Also an option for links to books in the Tilted Entertainment forum)