I know they have Content Match for the bigger sites: MSN, Edmunds, the Away Network, and Advertising.com. I remember reading somewhere (maybe here) that eventually this is supposed to roll out to include smaller sites. Does anybody know anything about this and if/when it's supposed to happen? Thanks.

I'm not sure when it's going to happen--it may be a while, though. In any case, I will definitely test it to see if it lives up to Adsense.

they have really been marketing the idea that not just anyone can join. they may not want to enter the smaller sites as it may not be profitable for them to do it.

since their stuff is primarily manually driven (vice adwords being driven by math) Overture had a much more expensive task at hand to run their ad network and they probably would not be able to cut small advertisers in on as much revenue as Google can. They are most likely using their "we partner with larger quality sites" line to cloak the fact that their finanical limitations prevent them from working with smaller content distribution sites and providing competitive payouts.