After surfing around on the net for a while, with the baby curled up in my lap sleeping, I called the Wildlife Center. It happened to be a very bad time for the Wildlife Center, as it was the beginning of September, and as the website states they were in a "four-month battle with the Ontario Ministry of Natural Resources, which escalated on September 12". For more information please see:
-Ottawa Carleton Wildlife Center
-A Volunteer's Story

I left a message with them and they phoned back, asking me for both my name and address. They told me they were not taking in any more animals. When I explained the leg was possibly broken, I was told by that particular person that the squirrel would have to be put down if such was the case. I said I would bring the squirrel in to be examined, but never did. The Wildlife Center has since closed, so I never got a chance to call them back and ask if it was really their policy to put down squirrels with broken legs, or only something said by an unknowledgable volunteer.

Dealing with the broken leg...