A source at Macblogz has stated that AT&T will offer a tethering plan for the 3G iPhone at only $30 a month. The plan will permit users to upload/download up to 5G per month.
But unlike other tethering plans offered by AT&T, the user will be cut-off when he or she reaches the 5G limit.
No word on the launch date yet, but since this plan is virtually identical to AT&T‚Äôs tethering plan for the Blackberry, it seems pretty reasonable to us.
If you cannot wait try PDAnet.