When Yahoo originally shut down Astrid I re-released it the same day under the namespace "org.astrid" without changing the name or graphics. It was predictably yanked for infringement.

So I thought long and hard and came up with the name "Tasks" and changed the namespace to org.tasks. The domain name tasks.org was parked, and a few years later I bought it through a broker. I have no idea if I paid a fair price, but it was probably a relatively expensive outlay for a side project?