My company uses Harvest for time tracking. It seems like a pretty good tool. However, sometimes I get really far behind on keeping it up. I would like something that I can interact with in under 10 seconds. They have a pretty good iPhone web app ... but it is just barely klunky enough that I don't use it. I am going to give their Windows widget a try. They also have one for the Mac, but I don't have my Mac powered up right now. Writing this is enough distraction for me for the moment. Anyhoo, I haven't done anything with it yet except install it, so I don't have any good feedback. Here's a screenshot.