Thanks to some very helpful folks at the University of Hong Kong, I've been able to add support for parliamentary constituencies in both Hong Kong and Canada. Like all OpenHeatMap areas, all you need to do is list the names of the constituencies and the values you want to display in a CSV file, Excel spreadsheet, or a Google document. Upload it, choose your display options, and you can create your own interactive political maps.

For more information and example files to download, go to the documentation sections on Hong Kong or Canada. I look forward to seeing what you build with these, so let me know how you get on.