Though there is a bookmarklet to add various controls to animated gifs at http://slbkbs.org/jsgif/ and also http://playgif.com/ (I believe the first one appeared on HN a couple of months ago)
On a different topic; I saw you speak at General Assembly last month and didn't have a chance to thank you then. The topic (Continuous Deployment) was pretty interesting and it was nice to see how you guys are implementing that at canv.as.