Users must get the mobitus software phone for their laptops and a headset. The service costs $16.95 (CDN) a month which includes unlimited calls to other mobitus customers. Long distance rates apply to long-distance calls to non-mobitus users.
This is very cool, because it shows that FatPort understands one of the hurdles of their service: what do you do with a wireless Internet connection? They are attacking this by developing the services themselves.
The service includes voicemail, call display, call waiting, and 3-way calling. You get email when you have voicemail. You can even get a toll-free number so that anyone in North America can call you for free. Currently, no support for a "real" phone number, but this is planned to be offered for US, Canadian, and UK phone numbers for an additional charge.
The system requirements list Windows-only options, but the FAQ lists all the details you need to set up any software or hardware SIP clients. Which means Mac users could use the softphone from Xten. Hmmm...seeing as how I haven't really gotten around to using the Free World Dialup number I have, I don't know if I would use this, yet. The choice of broadband connections is still in my future here in Vancouver, so something else that can perhaps help me avoid getting a landline.