When reviewing the G1 we found a lot to like, but a lot to dislike too. We knew that some of its shortcomings, like the missing headphone jack , were sadly permanent ( free adapters notwithstanding), but hoped that it would just be a matter of time before some enterprising soul (with an enterprising compiler) would take care of another complaint: the lack of multi-touch. Lo and behold now is that time and Ryan Gardner is that coder, author of a little app that proves the inability of the G1 to accept a two-finger salute is not a hardware limitation.

Read more here:
G1 multi-touch a reality, integrated headphone jack still just a dream