Oh Sprint, how I love thee. Especially with simple programming errors.
As noted below, Sprint has finally rolled out Picture Mail (MMS) for their Windows Mobile devices.
I chimed in how it didn't work on the 800w, but alas I was wrong (see comments). I had to choose my device from their selection picker and download the special 800w version.
But what is listed on the device selector? How about the Treo Pro. LMAO