Why lock yourself into one VoIP standard when you can have a device that does them both? SIP (Gizmo Project, Asterisk) and Skype (Skype) have historically been incompatible due to their using two different protocols. But now you can have both your VoIP networks at your fingertips when you have this Fi WIn SIP/Skype phone.
The phone comes in red, black, silver and white, has 3.5 hours of talk time, 60 hours of standby time, and supports 802.11b. No word on availability or pricing.