Part of this argument may be completely redundant from a consumer point of view. I raised it because of enterprise and industry issues, the capability to add e-mails to the "names" and thus add another level for potential "reputation" and access management, etc. Where consumers are concerned they want more mobility where and whenever they are on Skype. A Wi-Fi SIP phone may be a complicated solution when a USB device can turn a tradtiional cordless phone into a fully functioning buddylist capable handset. Similarly a PDA may work real well on the move.

Dependent on Skype's growth it may be a "mute" point. As a competitor consider what would if mean if Skype has a SIP bullet ready to fire at any time. One reason I raise the SIP Skype question is a few industry elements and open source advocates consistently raise an open standards argument. None of the big guys are open. So weigh in. Could Skype making a SIP move further accelerate change in the industry?