this wouldnt be the first time, handspring did the same with the treo 300, at the beggining it was launched at SD, and just SD. months later a patch upgrade was released making available SDIO
why?
a. they were so stupid, so not even developers knew the device was SDIO capable at the beggining
b. they knew it, but they were too lazy to make the drivers for SDIO at launch
c. some marketing misteries