Filed under: Cellphones, TransportationWe knew full well that a contactless payment trial would soon be underway in the city by the Bay, and now it's finally ready for use by 230 guinea pigs. Unfortunately, there's not a lot of details on the Samsung handsets and the technology itself, but we do know that the program is being closely watched in hopes of it operating quite smoothly. If indeed that happens, it could be "expanded," presumably allowing others in the area to have their bank account dinged with the swipe of a cell each time they need a lift. Furth