Canadian CS University Positions? Does anyone know if there is a centralized source of Canadian positions advertised by universities for computer science? I conjecture that this might exist since there are websites advertising math jobs for Canada, plus websites advertising CS jobs in general (CRA, Higher Ed). Additionally, there exists at least one such opening currently.

This is a special case of a previously studied problem, where it was asked on cstheory without the Canadian constraint.
The Canadian CS community is seriously under-server and under-organized.  The ACM (in the US) completely overshadows us, and since it (nominally anyways) tries to be international, that leaves little room for Canadians to get organized.  So typical community-driven issues, like aggregating jobs, does not happen.  The community is (now) large enough to be able to sustain such an organization (I know, I belong to the CMS, the Canadian Mathematical Society, and it manages just fine, and the sizes involved are in the same ballpark).

I realize that this answer is a bit of a non-answer.  But the (unfortunate!) answer to your question is 'no'.  So rather than just saying that, I figured I would elaborate.

Ok, so apparently my Google-fu was not good enough.  I just stumbled upon the CACS/AIC, which is the Canadian Association of Computer Science.  But the web site is astonishingly bare bones, with no real sign of the purpose, etc.  So still a 'no', but not quite exactly as I had said.  And CIPS is different, as it really focused on the IT side of things, not so much on the CS.