I received an email yesterday from an advertising agency called "Teracent". They said they were interested in running ads on my blog and asked what my rates were. I took a look at their site at: http://www.teracent.com/ and it says "beta". In their email it says they pay by the click or shared profit. Anyone have any dealings with this company?
Give them an overly high estimate for pricing. If they shy away it will tell you they aren't earning a fast buck and are possibly more reliable. Given the beta nature of the site they are obviously newer, but they might be worth a try.