I remember watching fours at Nationals *cough* a few years agoWell, that inspired me to look around.
The Canadian Figure Skating Championships included a Fours event until 1997 before the event was discontinued.
Here's something I bet most of us don't know: The last Canadian Champions in Fours included a familiar name on the team: David Pellitier.
http://en.wikipedia.org/wiki/Canadian_Figure_Skating_Championships