I checked out
webcams.com RSS feed. I've never really used the sponsor itself before, but they have decent feeds. They have various templates you can pick from and a previous window next to it, so you can see what the feed will look like beforehand. Then you pick the niches you want to use and then it generates the link code. The girls pictured are attractive and not-so-attractive, so its not the best for a "babe" site, but good for a webcam or amateur site. They do provide clickable links and a decent amount of text in the description along with the pic(s).
Next up is Juicybucks. So far I've just looked at their RSS feeds for for dreamteenagers site. It has a single 300x400 pic and then a paragraph that is written from the teenager's perspective introducing herself. It does have a decent amount of keywords thrown in and a clickable link at the bottom. Overall this is the kind of feed I'd like for what I'll be using them for.