Forum Moderators: skibum
If you do decide to contact any potential advertisers that don't know you already, you may want to pick up the phone instead of sending an unsolicited email. Could get you some trouble.
(DOH! I posted twice...sorry)
Depending on your market, you may also try to sell some of your advertising on eBay, but it seems that ad space gets either quite a few bids with a high ending price, or lucky to even get a single bid. So again, it would depend on your market, but it can't hurt to try ;)