Instead of thinking it as your list, turn it around and think of it as lists of people (or circles/bubbles if you please). The bubbles live in your "tank" of ta

Instead of thinking it as your list, turn it around and think of it as lists of people (or circles/bubbles if you please). The bubbles live in your "tank" of tasks. Your tank has different layers. Each circle/bubble starts at the bottom but has a certain buoyancy - which guides its ascent to the top. For e.g., family bubble is very buoyant - so if you get a mail from your wife, it bubbles to the top really fast. In the time it takes to rise to the top, it can grow larger (more messages from your family) - which in turn increases its buoyancy. The big difference is that you can change the buoyancy function at any time, causing the bubbles to start sinking/rising according to that change. Bubbles burst after some time - which means they get automatically archived or some sort of autoresponder sends an apology-for-delay email You can play with different visual dimensions as well, like stale bubbles floating to the left.