Since this phone seems so cool, there is almost NO chance any US carrier will sign it, If a cheaper, uglier version is released, T-Mobile or Cingular MIGHT support it, but likely only for a couple months, leaving their customers high and dry with accesories and other stuff.
The American predecessor was the Audiovox SMT-5600 first carried by AT&T and now with Cingular. This phone is very similar to the SPV-C500. T-Mobile Germany is carrying a variation of the SPV-C550 verson of the phone called "SDA II Music Phone" and rumor has it that T-Mobile USA will be picking this phone up sometime in the first half of 2006. The Audiovox SMT-5600 is one of the nicest phones I ever saw when if first came out, but now I would wait for the SPV C550 with better camera, improved joystick functionality, bigger screen, additional memory, and possibly a faster processor.