nandemoari quotes a story at Infopackets:
"2009 has gotten off to a great start for a team of iPhone enthusiasts with little regard for Apple's licensing requirements. They've finally figured out a way to get the phone to work with any cell phone carrier (and not just AT&T). The iPhone Dev Team is best known for their work on 'jailbreaking;' the technique of altering an iPhone so that you can run any applications on it, not just those approved by Apple. Given the company's questionable vetting policy for entry to the official App store, it's not surprising many users approve of jailbreaking."