See this thread also: Content Sensing Affiliate Programs

Digitalpoint members are compiling a neat little list of both context/content sensing affiliate programs and viable adsense alternatives. You do have to wade through the threads to get to the good stuff but it's quite worth while as the sites/programs are weighed and judged and scrutinized. Here's what they've listed so far..

• http://www.affiliatesensor.com/
• http://www.infograbber.net
• http://www.intellitxt.com/
• http://www.quigo.com/

The first one has the DP consensus of "cool concept, crap products", the second also is a cool idea, the program writes it's own affilate id into the first ad displayed on the page and makes no secret of it.

The last two I mentioned here - follow the link for a good discussion at wmw on those.