Rogers AT&T will be the only cell provider in Canada that will have the rights to sell the iPhone other than the various Apple stores.
Dates are not set when they will have them in stores and Rogers at this moment does not know if they will change the prices on their data plan. So no real use to buy this phone yet. Only advantage is that its WiFi so thats good.
Rogers is the only network capable of such phone. Fido, well it's really Rogers now, but the network isn't large enough. Telus and the others are all CDMA.