T-Mobile is announcing this evening that it's now got 75 live HSPA+ markets online, with coverage for roughly 200 million Americans up and running by the end of 2010. That footprint will start off at a theoretical max downlink of 21Mbps, but the carrier will be looking to scale that to 42Mbps in 2011 with the capacity to upgrade to 84 and 168Mbps down the road -- all without ever worrying about LTE. The veracity of T-Mobile's insistence that this is a "4G" network remains debatable -- particularly in light of the ITU's r