We were pretty sure Acer's Iconia Tab would be riding Big Red -- you know, given the LTE modem and Verizon apps on board -- but it looks like the company will also support America's GSM juggernaut with a "4G" radio on board. AT&T just announced that the Acer Iconia Tab A501 will bring the 10.1-inch Honeycomb form factor and dual-core 1GHz Tegra 250 processor to its network sometime in Q2, giving the carrier a Android rival to Sprint's