I have a friend in a similar position who is looking to go and work in Canada. He showed me this points system online calculator thingy the other week. I think the one he showed me might well have been on the Canadian government website. It could have been
this one, but I'm not too sure. A quick search on google for Canada+working visa online application yielded a lot of results.
If you have a degree, relatives in Canada (and some of the relations you are allowed are pretty tenuous if I remember rightly), long working history, etc etc, then you are likely to score a higher number of points. Can't remember the threshold for gaining the working visa, but I think it might have been around 57 or something.
Will ask Chris for the site address next time I see him if you haven't found anything by then. Good luck with it.