If you want to see what official Ottawa is doing on Twitter, I'm trying to maintain a directory of what I call Political Twits. It ain't pretty, but there you'll find the Twitter handles of any MP I find on Twitter, any Parliament Hill staffer, Hill journalist, or Hill hanger-on. You'll also find a links to institutions in official Ottawa -- the Canadian War Museum is a good example -- as well as any hashtag I can find or create associated with the work of the federal government. My directory is not for people talking about federal politics, it's a directory of the people actually engaged in federal politics -- the primary sources. As it says on the home page of that directory, if you've got something send it along.