This announcement is a little old - it was featured on engagdet a couple of months back. But its not out yet except for some lucky few and 'testers' so there really hasn't been a review yet on the geocaching performance of the GPS - at least none that i have been able to find

and i haven't heard any reviews yet from some of their folks on twitter. But it looks like an awesome device all the same

Although sticking it on AT&T wasn't the brightest idea that Garmin has had, LOL, but hopefully they wont follow Apples course and open it up to other providers.