Reggie is the maintainer of the talk.maemo.org theme. Andrew is the maintainer of the Minimalistic theme. Who commits to create and maintain additional themes? Asking for choice is nice and I would do it all the time. But more choices implies more work for someone. If that someone is you, coming with mockups, theme code or a commitment I'm sure Reggie and co will look at your proposal with different eyes. You don't need to be a C or Debian expert for that.