Four companies are offering free advertising worth up to $600. I just signed up with all four, so this might be good for anybody out there with a site they want to get some more traffic on. All four require a credit card number, but as long as you cancel your ad before you use up all your credit, you'll be fine.
Microsoft: Go to theto get started with Microsoft AdCenter and use promo code DM-2-1106 (also listed on site) before January 15, 2007. This $200 of free advertising requires a charge of $5 (so I lied, that makes it actually $195 of free advertising).
Google:and take advantage of their Christmas season $50 advertising coupon. No expiration date seems to be listed for this one (but that doesn't mean there isn't one).
LookSmart: Follow this link to sign up for LookSmart and make sure to use promo code SESCHQ4 at check-out for your $300 credit. This offer is good for first time LookSmart advertisers only and your daily budget must be set to $10 or higher, meaning you can only freeload for a maximum of 30 days. Also, this offer expires December 25, 2006.
Ask:and enter promo code SESCHI06 during the check-out process.
Some of them might try and auto renew you, but for $600 in free ads, I don't mind checking the stats frequently and shutting down my ad right before I go over the freebie limit 🙂