The South African Astronomical Observatory is running a competition to name a recently discovered asteroid; the name is being selected by public vote from a short list of names, one of which is Ubuntu. I think it would be cool to have an asteroid named after a Linux distro, especially appropriate when its founder is an astronaut, so go vote online.
The website is http://www.nameourasteroid.org.za/ and voting is open until 31 January 2010.
Fritz