It's funny that just this past weekend I was looking for something like your product. I've imagined it more to be a webapp with mobile client though. Something like http://highrisehq.com/ but more personal. (A PRM instead of CRM, one could say.) It should keep in sync with my address book (or rather replace it at some point) and tell me not only what I know about the people in it, but also what interactions I had with them. Ideally it would augment that information with things it can find out on its own over Facebook and the web. (A bit like Gist, although I've found the information it can find to be useless most of the time.)

Does anyone know of a product, besides Met, which comes close to what I'm looking for?

Congratulations on your launch!