Went to the South Florida store today, and the same white one that was there a few weeks ago is back. It seems to be stationary, as described above. The employee there told me that they are expecting a newer model towards the end of the month; a black one. She also said that there should always be at least one there from now on. Also, they are moving the store to Miami, but leaving the service center where they are.
Also, she claimed that three local people have done their configuration as part of the initial ones.