I am going to try to use contribution points that you (hopefully) can exchange for Poker Room credits amongst other things. I will not just have the contribution points for this purpose though, I have a rather big system in place with member auctions, website enhancements, advertising and possibly even hosting (imagine getting free hosting for being active on a poker forum, promoting your website!).
I made a little post in my blog about this in case someone want to see my mad plans 
http://www.emeraldace.com/forum/index.php?automodule=blog&blogid=1&showentry=15
The system will need some testing and I’ll need to get in touch with the afilliated poker rooms first to see what can be arranged….