Rumor has it around November time frame with full 3G HSDPA support. Since this is about the time that Cingular will be doing their nationwide 3G roll out it makes good sense to have a device that can actually benefit from the serivce and entice users to use it.
The radio on this unit has been awesome. What is especially intriguing is the fact that the antenna is internal on this CDMA device. Most CDMA devices use an external antenna (7250 is an exception too).