Wired have a brief but cool article
looking at the intrusion into Valve Software's network that resulted in the leaking of the Half-Life 2 source code before the game had even hit shelves and Valve's subsequent attempts to trap the German-based hacker by, well, lying and pretending to offer him a job in the US so the FBI could nab him:
Coordinating with the FBI in Seattle, Valve began a correspondence with DaGuy, who expressed interest in getting a job with the company. From clues in the e-mail, the FBI identified the aspiring employee as Axel Gembe, of Schonau, Germany.
Perhaps sensing that his relocation expenses would be shouldered by U.S. taxpayers, Gembe didn't take the bait. He was ultimately charged in Germany, where he was sentenced to probation.
Worth a read!