The Canadian National 'Do Not Call' Registry went live in Canada yesterday and I managed to add our home phone and cell phone to the list last night. I have heard that the system has been flooded so its operation has been hit and miss. After you register it will take about one month for the calls to subside.
To add your phone and fax number(s) to this registry and avoid annoying telemarketers go to:
'WhereDoesAllMyMoneyGo' who features a helpful post on the topic.