This was previously discussed once on Webmaster Radio. text-link-ads.com the links you buy give you a valuable inbound link which will be assessed by search engines. What other services, that are like Adwords or Adcenter will give me a non javascript solution, where the links will actually help?
I've found Text-Link-Ads to have a lot more relevent sites for my area and are higher quality. I recently got a ad from LookSmart. Other places I also use is LinkWorth and that's about it basicly.
LinkWorth and TLA are the only reall good ones. I'm a STRONG supporterd of TLA (per my sig) and I have been an active member of the program for quite some time. It's very profitable and I think TLA.com really is going in the right direction. Plenty of bugs to be worked out still, but they are improving it and adding new features everyday.