Text Link Ads

Although this isn't exactly a permanent form of advertising, these types of links tend to be a bit more below the radar than a typical site sponsorship deal. There are several text link ad brokers that have a network of sites that are willing to put text links on their website in return for a monthly fee. At some of these sites you can even get placed on a single page on the site, rather than on every page (this is good because then your link doesn't look like a normal sponsored link!).