Does anyone know any ad or marketing companies which represent high-traffic sites in terms of selling ads, etc?

I’ve been looking around but haven’t found anyone that fits the bill. Looking for established, proven sites capable of selling several million ad impressions a month on high end tech and IT sites.

Here’s the email I’ve sent a few people:

Hey,

One of the projects I’m working with is looking to start really selling advertising for the first time. It gets about 10,000,000 visitors a month, is highly targetted IT and tech traffic, regularly gets picked up by Google News, Slashdot, Linux News, Linux Today, CNN, etc.

Obviously we don’t have staff to sell ads ourselves, so we’re wondering if anyone knows any marketing companies that would sell ads for us in return for a cut. I’ve tried doing a Google search for these types of companies, but all that’s coming back is lower end “we’ll help you sell your 100$ in ads” types of companies.

We’re looking for something more high end, but we aren’t exactly sure where to turn.

Hopefully someone here will know someone or know a company like this.

Thanks,

Jeremy

ps: advertisers who are willing to spend at the 2500$+ level are welcome to contact me as well.