Apple's annual developer conference in San Francisco.
AT&T 3G MicroCell Site Goes Live, Monthly Fees to Be Up to $19.99? [Updatedx2]
Signs of iPhone compatibility with the 3G MicroCell service surfaced in an AT&T carrier settings update issued in early February, and AT&T reportedly confirmed in June a launch of the service by the end of 2009.
Update: Engadget now reports that the 3G MicroCell service is currently only running as a "public trial" in Charlotte, North Carolina. The $19.99 per month pricing is reportedly also a part of the trial, so apparently no final decision on pricing for the full rollout has yet been made.
Update 2: GearLog clarifies that the 3G MicroCell device costs $150 and that, besides the monthly "unlimited minutes" charges, users also have the option of using their monthly wireless minutes for no additional charge.
According to an AT&T rep in Charlotte, the MicroCell costs $150 and service is free (heck, you're saving AT&T money by using it) unless you sign up for AT&T's "unlimited talk" option, which gives you unlimited minutes of calling over your microcell. That costs an extortionate $20/month, though it also gets you a rebate on your device.