pyRads [1] MetaFilter TextAds [2] Google Self-Service Advertising System [3]
So far, aside from affliate programs for porn sites, the only way to still generate some revenue from a website is advertising.
Most web advertising is annoying and getting more so. But an interesting twist seems promising: less is more. Or rather—small text only based advertisements. Several sites are experimenting with them right now and since they're small, fairly unobtrusive, highly targetted and cheap they might actually become the future of web advertising.
I hope so. I'm getting tired of the crap that's being pushed now.
[2] http://www.metafilter.com/textads.mefi