According to some unannounced sources, T-Mobile (formerly known as VoiceStream) has the MMS infrastructure right in place!
MMS is really funny and the next step of multimedia messaging and the follower of SMS. So ask T-Mobile what's up!? ;-) Personally I love to use MMS and with devices like Pocket PC Phone Editions or Smartphone 2002 it becomes even funnier! So push that guys in the US...
If you haven't seen MMS until today, check out my Personal View of o2's MMS service here.
Cheers ~ Arne