I often start on a project with the best of intentions to finish, but then something else comes up and I get side tracked.  I was going through code this morning and came across one such example from when I was doing the Travelling Salesman Problem on a device.  Someone on a newsgroup said a device wasn't powerful enough to do it - I thought that was BS, so I sat down and started coding.  Of course then other things came up and this ended up unfinished (though it's probably only a day of work away).  I did get far enough to do Help documentation for it.

Knowing myself and the list of things I need to do, I'm probably not going to get back to it any time soon, so if someone else wants the mental exercise, feel free to finish what I've done.