Included in the poll are Patrice Bernier, Will Johnson, Dwayne De Rosario, and Olivier Occean.
I include him only because he converted a penalty just the other day in Canada's 2-0 friendly win over Trinidad and Tobago. The players remaining on the pitch when the penalty was awarded hardly constitute a first choice squad, but it was telling that Johnson was chosen ahead of some of the more offensive-minded players on the field (notably Tosaint Ricketts). If you watch the highlights you will hear someone (I think Hart) yelling from the sidelines for Will to take the ball.
The penalty itself is not the most confident and the keeper gets a hand to it, but credit Johnson for at least hitting it with power.
Dwayne De Rosario
This would normally have been the default option. De Rosario notched 4 Canada goals in 2011, all penalties. But he has not attempted a penalty this season. I don't pay close enough attention to DC United to know whether they have not been awarded any spot kicks (unlikely) or they have another first choice taker.
Bernier is the reason for this post. His penalty conversion in yesterday's 3-1 win over San Jose puts him at 5-of-5 for the season. The only problem is that he might not be in the team if everyone is healthy, though I am more convinced than ever that he should be.
Occean is Canada's first choice target forward and has experience taking penalties with his club team last season. He should be confident given the opportunity.
If you vote 'other', explain your choice in the comments.
Update: I also like this question from Grant in the comments: "How about, who are your five takers if Canada finds itself in a do-or-die situation?"
I'll take Occean, Bernier, and De Rosario. After that it gets tricky. Kevin McKenna, maybe? Josh Simpson?