HBO has been quietly working on its PunchForce tech since about 2010, when it tried to convince British star Amir Khan and Argentine boxer Marcos Maidana to wear the sensors for their light welterweight title bout. Neither seemed particularly eager. Now though, over a year later, the latest in fist-tracking technology seems to be nearing its big debut. Tiny wireless monitors, worn under the wrist of the gloves feed velocity and impact data back to a laptop with a special receiver -- all of which now have Uncle Sam's approval. The real fun though, is what happens next. The
