Yea, those plans are right. The AT&T site for the plans is here,
http://www.wireless.att.com/cell-pho...ntentId=900334.
The data plan just include the unlimited data for the iPhone. You know, surfing the net and email while not connected to a Wifi point. Most people haven't had this with their phones unless they've had a Crackberry or Treo so they neglect to add the extra money in for the data plans.