http://hothardware.com/newsimages/It...ivateThumb.jpgAT&T this week introduced new shared data tiers (again) that it claims will help businesses "raise the productivity bar" by offering expanded choices, but not without raising the phone bill, too. By a lot. The new plans aren't just for business customers, either; home consumers are welcome to pony up for a 30GB, 40GB, or 50GB Mobile Share...
