Three visual reason why Facebook Deals shouldn't be overlooked... despite being a day old and despite the large lead of Groupon and LivingSocial. 1. Facebook already has the distribution of consumers AND advertisers to kick-start the product. Raising awareness and driving adoption can be encouraged via promotion, feed virality, etc:

2. Advertisers are already on Facebook. And Facebook users are already used to interacting with brands and ads. In simplest terms, Deals is really just a different ad format... but rather than asking users to click or like, they can "buy" in-line. That's powerful. It has worked well for "liking" - which is both an in-line action and a social behavior... why shouldn't it work for purchases?

3. Facebook is the most used and downloaded mobile application. Mobile represents two important things for Deals: A) the ability to use location / proximity to deliver targeted deals B) a huge viral hook through push notifications and SMS (my phone buzzed all day as friends liked / bought related deals)