AT&T's iPhone Tethering Plan Details?

MacBlogz claims to have heard details of the iPhone tethering plan that AT&T is planning to offer. Not surprisingly, the details are nearly identical to the current tethering plans available for other smartphones from AT&T.

- 5GB Data Cap (just like Blackberry users) - AT&T will automatically turn off your tethering connection if you use too much bandwidth. Of note, the 5GB cap might get sliced for all users, not just iPhone users, in order to accommodate all new tethering plan customers (bandwidth demand).
- Expected speeds: GPRS: 30k - dialup speeds / EDGE: 110k - ISDN speeds / 3G: 1000k - slow broadband.
- Will be +$30/month, new iPhone plans may be rolled out with tethering rolled in.

Existing AT&T Smartphone users have similar plans available to them at this time.