Hi Andy....feel free to ask as many questions as you wish!
Is one of you British and 1 Canadian?
Yes, I am the Brit.....my wife is therefor the Canadian.
Did they E-mail you when the decision was made?
No. I found out that a decision had been made when I checked my status on the CiC website.It simply stated "decision made". No detail of the decision was given.
Did they request your passport in a written letter?
They emailed the request....this was the first I knew that the positive decision had been made.
Did they stamp the visa into your passport?
When you get yours......you will understand this reply.

They don't so much stamp it in.... rather, they attach it to your passport. It is quite a sophisticated ( and dare I say, beautiful) thing.....holograms and all!!!!!!
Hope some of this helps.
Steve
PS It is my understanding that as a direct result of the volumes being dealt with at CiC.....passports are taking upto 3 months to process if sent by post