One idea might be to utilize Google Adwords (network sites) to find sites by demographic and then * use Adwords to advertise there, * go direct to the sites a

One idea might be to utilize Google Adwords (network sites) to find sites by demographic and then * use Adwords to advertise there, * go direct to the sites and see if you can score better deals, * use various websites like Alexa to find websites just like those sites so you can go direct and talk about sponsorships * use a combination of the above