No, this certainly isn’t the first time we’ve seen multi-touch demonstrated on the HTC G1. This time around however, the sweet demo is accompanied by an extensive how-to guide that will walk you through enabling your T-Mobile G1 for some sexy multi-touch zooming action. Of course the process is hardly T-Mobile approved so we have to warn you that you’ll likely void any warranties, but such is the price for the more ambitious mobile users out there. All in all, the process isn’t overly difficult for savvy gadgeteers but there’s always a chance something could go wrong – consider this your brick warning. This hack is also still in early stages so multi-touch is not yet implemented in all of the areas you’d want it to be. If you’re still fiending for some multi-touch love on your G1 however, toss on your hacker hat and hit the read link. For those who don’t quite have the stomach for invasive G1 surgery, no worries – you can still enjoy a saucy multi-touch video after the jump.