I love my Nokia n800. I bought it in Las Vegas last June and I use it almost everyday. In fact, this post was typed on it using the fullscreen keyboard.
Anywhere you have a wifi network, you can use it. You can even install 3rd party applications, something that cannot be done on an iPhone.
I installed Skype and Gizmo so I can do phone calls. The n800 with earphones and an embedded microphone.