MapServer (with TileCache) + PostGIS + Google Maps: a demo
Here is a demo for colouring the polls by their 2008 election result:
Only zoom levels 7 to 10 are coloured for now (it starts at 7). The colours represent the party that won any given poll territory, but in Canada, it's a first past the post system at the riding level (some ridings contain more than 100 polls).
It's running on my laptop, so the site might be down at any point, especially during the night. For the next step, I should be finding a way to add useful infos, like detailed results per poll/riding.