Free Advertising:Google $50, LookSmart $300, & Ask $50

Earlier I had posted about Microsoft adCenter’s Free promo code, here are the details and links for other company’s offerings:

Google: Click here to sign up for Google AdWords 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: Go to this sign up page and enter promo code SESCHI06 during the check-out process. So there you have it, $600 of free advertising to get you started with whatever online presence you might have. Thanks to ProBlogger and Paul Allen.