(Prospective) Mesh Networks as the next big thing

It's maybe time to find, design and imagine mesh networks scenarios of use. Start to get rid of empty social network and focus on proximity. What can we do with mesh/ad-hoc networks ? Kevin Werbach asks the question in the feature. So we have bluetoth, NFC, WiFi, nokia phones, j2mee, what do we need ? data description? we already have rdf files full of stuff (foaf, location shit...). Let's brainstorm about it :)