Own a mainstream site with a good amount of traffic? I want to buy advertising
 

Hey I am looking for people with mainstream sites that get a good amount of traffic. Teen sites (where the traffic is old enough to use their parents credit cards, or have their own), early 20's and older sites where those surfing have interest in the internet and know their way around.

the advertising will be none vulgar or adult related, i am looking for a good place to advertise a project that i want to build up.

most any site that can reveal signups for what i want is good