In less rule-abiding news, the not-quite-surgical hand of the jailbreak community has taken a gander at the gold. A developer known as msft.guy, whose previous credentials includes recently-released binary "which enabled blacksn0w unlock port for iPhone 3GS on iOS 4 Beta 4" according to Redmond Pie, has updated PwnageTool for yesterday's update. As always, proceed with that one at your own risk, and if you're curious but hesitant, the ever-reliable iPhone Dev Team promise a full jailbreak / unlock suite later this month. Either way, video proof is available after the break.
Update: Just to clarify, iOS 4 now works with any iPhone / iPod touch that's already been proven compatible -- the trick here is that you now don't need to register with Apple before trying.
[Thanks to everyone who sent this in]