I'm guessing you don't follow Team Canada at major international competitions, particularly the World Championships where he was named the Best Defenceman of the tournament in 2003, where Canada won gold. He was also instrumental in the following year's victory as well, playing lots of minutes and jumping into the rush.
He is a very smooth skating mobile defenceman in the Scott Niedermeyer mould, but slightly more physical.
On the larger ice surface, Bouwmeester was one of the best players on the ice. His offensive saavy is a distinct contrast to someone like Ed Jovonovski, who still hasn't figured out when to rush and pinch and when to hang back.
He also won a Gold medal in the 2004 World Cup.
It can be difficult to rank Canada's D across two different-sized ice surface, but in my opinion it would be:
1. Pronger
2. Blake
3. Niedermeyer
4. Foote
5. Redden
6. Brewer
7. Bouwmeester
8. Regehr
9. Jovonovski
10. Hannan
Keep in mind, this is off the top of my head.