Palm Eos: The Successor to Palm Pre?

Palm have long been candid that Pre was only the first WebOS model in their lineup, so this is almost certainly a Centro or Treo successor. Engadget (http://www.engadget.com/2009/04/30/palm-eos-super-thin-3g-an...) have what may be a render

Looks nice, but the best way to go into competition with Apple is to release their phone for a different service provider, like Sprint or Verizon. We know Pre is for Sprint, so why is this one likely to be for AT&T? This would be a bad idea. I do not care how good these phones are, I am not subjecting myself to AT&T service.