Mine already is always connected... via WiFi or Bluetooth (and my 3G/HSDPA mobile phone).

Consider this:

iPhone - staggered launches around the globe, individual negotiations with cellular operators who impose their requirements on the devices final functionality, software locked, individual country radio emissions compliance testing, works only on 2G EDGE

Internet Tablet - global launch (apart from most of Asia), no cellular operator interference, open source development, FCC testing is good enough for most countries, works with phones on all networks from 2G GSM through to 3.5G HSDPA.

Nokia had good reasons NOT to include a phone in the Internet Tablets, and I for one agree with their choice as I can choose my own mobile phone (which doesn't have to be a Nokia) and I also don't have to hold a brick to the side of my head (the N800 has a large screen and is therefore itself quite large!) when I want to make a phone call!