If you donate 10 BTC (which pays for about a month of hosting), you get donator status:

http://i.imgur.com/X3gaW.png

http://i.imgur.com/C8IJv.png

If you donate 50 BTC, you get VIP status, which allows you to set a custom title:
http://i.imgur.com/GBOav.png

http://i.imgur.com/pGCD0.png

http://i.imgur.com/bOIEG.png

This is not (yet) automatic: you need to PM me before donating. See the new donation page for more details.

This is part of an effort to make the forum self-sustaining. If donations alone are not enough, a few auctioned-off text ads will probably be added.