TechCrunch writes about Zixxo:
If you are an advertiser you can try this out for free – Zixxo is not charging anything to advertisers for all of 2006. They have fairly robust tools for creating a coupon on the site, or advertisers can upload an existing offer. Coupons can be targeted locally or nationally, and there are other great features like pause to allow an advertiser to pull a coupon during busy periods. The eventual revenue model is to charge $0.50 per coupon printed (or click to an online offer) once they begin charging.
Users can find coupons via search or browse on the site, or receive email or RSS alerts for the location and/or coupon categories of their choice. Ive registered and will receive offers within an area around my home zip code (I chose 5 miles, but this is set by the user).