Hey, I'm set to go on stage at ToorCon in San Diego a bit later today to demo my new website. The service is a bit rough right now, but in general, you post a wpa2 handshake and send a bounty that I store in escrow, and then later someone comes along (maybe you!) cracks the hash, and receives the bitcoins, and then you get emailed with the passphrase.
I think that this is also especially good timing because with the shipping of ASIC miners and splitting of the block reward both coming soon, there will be a ton of people who want bitcoins and have garages full of GPUs.