Cracking wireless keys with a brute force attack can take forever on a regular desktop PC, requiring days or weeks to run through millions of combinations. With cloud computing, that time becomes minutes.
The WPA Cracker site is meant for security research, and if you send them a dump of your captured wireless network traffic, they can analyze it with up to hundreds of millions of passwords in mere minutes.
The service isn’t free, but it’s definitely very interesting, and goes to show that you should really use a long string for your wireless password.
WPA Cracker [via BoingBoing]