http://www.ad2go.com/
Pre-Register for Unlimited Free Advertising!
On June 30th 2006, they will launch a brand new free advertising service, a free advertising service designed for small and micro Web publishers eager to get their word out and putting their most valuable commodity to work!

They offer you the opportunity to be among the first to sign up for this totally free service and reserve the best positions for your Web business.

You can place UNLIMITED UNIQUE advertisements.
http://www.ad2go.com/

Google Buzz