The king of mobile television content, MobiTV, has shut down its British office to focus squarely on the burgeoning U.S. market. While mobile TV still is in its infancy here in the U.S., we'd think there was more immediate potential across the pond. Guess not. MobiTV is shuttering services it provides to UK carriers 3 and Orange, along with jettisoning the J2ME app that makes mobile TV possible on the Orange network (according to reports). Hey, at least MobiTV still loves Windows Mobile, right?