I did something today I thought I would never do. I gave up my unlimited iPhone data plan for the 5GB WiFi tethering plan. No, I wasn't forced by the now famous AT&T strong-arm tactic of throttling data speeds for people who reach or surpass the 2GB data use limit. From what I understand, those "limits" are subject to regional use patterns and can vary greatly from region to region. I suspect those limits might be a bit higher in NYC as I have never received the dreaded throttling email and I consistently use at least 2-4GB on a monthly basis.