If I get the new skype wifi phone (or pre-order it) can it be used anyplace where a wireless connection is based? For example, if I was driving through the city (I live in Chicago) can I "hook up" to any wireless connection that is leaking onto the street? I know there are certain wifi hotspots in the city where I could probably connect but I'm curious if the wifi phone can essentially replace my cell phone (at least in the city). I would appreciate any answers on this before I drop $200.