Check out the Canadian GIS site under Mapping in the links section on the left side of this page.
This site provides a wealth of information on Geographic Information Systems in Canada both Federally and by Province
Be sure to visit the link to DataBC and the Google Maps for Canada links.
Information provided on free GIS data, tutorials, some historic mapping. If your into mapping, be prepared to spend some time here.
Of particular interest to history nerds is the audio file on Historic GIS mapping research in Canada which is included in the W. H. Pugsley collection under Historic Cartography.