Banner Adds

Im trying to promote a product that people dont know they need (so they wont search for it)
So i though i could present it on sites that i think they may visit, like Yahoo Finance, BBN or other white collar like sites
How do i find out what agency provides the ads for those sites. I think bnn is doubleclick is that google.
Also is there a way to set the google adsense content network to a very specific parameters?
Thanks

See original post by DrShirts