OK, here's the drill, this guy appears to have stolen Dave's camera, laptop and Nintendo DS and we're going to help track him down in a vigilante 2.0 style. If it doesn't work, blame Clay Shirky, if it works then Iain over at crackunit.com gets the credit.
The stuff was stolen from Pratt Mews, London, NW1 and you can see the CCTV footage here. Note that the suspect walks in with one bag and walks off (frame 4) with two, one of which appears to be Dave's Lowepro camera bag.
