Seif Lotfy commited a nice zeitgeist integration branch for sofware-center here. I’m pleased to say that it is now fully integrated into software-centers trunk bzr branch. It won’t make Ubuntu 10.10.10 but when 11.04 opens, it will be one of the first new features 🙂
It is able to tell how many times a installed applications was used. While this is pretty cool already, I imagine it is only the start and we will find more exciting ways to use zeitgeist.