I'm fundraising for my next project, and im offering 25 ad spots on the homepage, for life, for $20 each. Each ad will also link to a subpage with a little description and image, basically saying you helped sponsor the project etc. The money will go to software licenses and a few programming jobs. More than one spot per person is fine. You'll also get an unlimited free run of the software (it's basically a forum plugin to give users something extra, can't give out too many details here). As the project hasn't fully started yet, there's no traffic/backlinks to speak of yet. Money via paypal, more details can be given if requested.