Taking this a step further: 1. Use Facebook Connect to create a library of things that you own. e.g. DVDs, tools. 2. Suggest Collections/activities that arise

Taking this a step further: 1. Use Facebook Connect to create a library of things that you own. e.g. DVDs, tools. 2. Suggest Collections/activities that arise out of your social network: "Amy, Jon and you have all the Star Wars movies among you: Time for a Star Wars Marathon? David and Emma would be interested in joining(based on interests)!", or "Joanna and you have all the things needed to go camping". 3. Profit model: Suggest things to buy on Amazon that "completes" the collection: e.g. "If one of the three of you bought "Snatch", then you would have all the movies by Guy Ritchie" This requires data mining for list generation (see Google Sets), Facebook APIs / Opengraph, location apis, and Amazon APIs, and has a money side to it. [i hereby release this idea under the "buy me a beer if you use it" license]