Apple should have found a solution to build in AT&T 3G into a MacBook Air...so what is the best solution so far on getting AT&T 3G on this new Air I just got? I know USB modems exist, but I haven't had great experiences with those things in the past (They always seem to run pretty slow, despite my phone in the same location and iPad in the same location will FLY). Maybe a Mi-Fi solution from Novatel?