Interesting - Rogers and their Fido subsidiary pushed out a Carrier Settings Update for the iPhone (to version 7.1 for those keeping track). More interesting - iOS 4 seems to pop-it up over-the-air and offer to install it on-device. (Best as we can remember, the last update popped up in, and was installed by, iTunes on the desktop).
One more step towards the tether-less future. Anyone else, anywhere else, get an update?
[Thanks for the tip, Alex!]