The school that i work for recently baught a skype phone for me to use around the site, we have a pretty good wireless coverage all over with access points all the same (airport extreme).
The phone works great once joined to an access point and isnt moving but once you go out of range of an access point it takes about 2 hours to connect to the next one (the access point ranges should overlap).
Didn't think much to it for that reason.
Has any one else used a skype phone and what did they think??