Well that didn't take long.
Just four days after its release the iPhone 3G has been unlocked according to a report at Gizmodo (via TechGuru). In order to accomplish the feat Breno MacMasi used a SIM card adapter that piggy-backs onto the iPhone's native SIM card and tricks it into thinking that it's using an official carrier.
It's not a full software unlock – yet, but it definitely works according to the YouTube video above posted by MacMasi. How long will it be before we see a full software unlock for Apple's latest gadget? Anyone want to hazard a guess?