The Most Active Senator: Spartacat
Even though the Sens aren't in the playoffs, their faithful mascot Spartacat is trying to get in on the action. The Senators recently posted a video of Spartacat making his Round 2 playoff picks in an attempt to be the replacement for TSN icon Maggie the Monkey. Maggie will be retiring at the end of the year.
Also, Spartacat set up a Twitter account, which you can check out if you want to follow insights from the furry beast, including current thoughts on the World Hockey Championship ("Finland wins...should have had Fish or Heater to shoot...regardless, it doesn't matter...BRING ON THE LATVIANS!!!").
Finally, Spartacat is so popular, he even has a fan site, which features pictures, jokes making fun of the Maple Leafs, and this page that leaves me without comment.