Schoolscum.com gains 100+ members a day. We've been open since july 5th, there is 1250 members today.

I am selling 468x68 spots for $150.00 /mo.
There are 10 spots open.

contact: advert@schoolscum.com for more info.

Just a suggestion:

Many people won't be interested in paying a monthly fee for advertising, as they won't be sure how much their banner will be viewed/clicked. It may be better to make an offer of payments per expressions, like $150 for 1.000.000 impressions or $150 for 200 clicks..

Just a suggestion II:

Many people would like to see your site (forums) before signing up or doing business with you.