If they add GSM capability, I'd want it to be on the following terms:

a) completely unlocked -- no carrier deals, no carrier limitations; all or nothing

b) not at the expense of WiMAX. If you can't fit Wifi + BluetoothDUN + WiMAX + GSM into the device, then drop GSM.

c) I'd also put BluetoothPAN as a higher priority than GSM. Get Wifi + BluetoothDUN + BluetoothPAN + WiMAX working before even looking at adding GSM ... and only add GSM if you can do it without sacrificing any of those capabilities.

d) GSM service MUST be optional. Nothing on the device must _depend_opon_ nor _assume_ the presence of a GSM service. The only exception would be if they include an actual "phone" application (independent of Skype, SIP, and GoogleTalk) -- obviously that can be dependent upon the presence of GSM.

e) I don't know if this goes without saying or not, but I don't want it to only be HSDPA/HSUPA. There are some carriers and areas for GSM that are still EDGE only (might be some that are still GPRS only for all I know). It should be capable of "down-shifting" to those speeds/protocols if the faster ones aren't available.