Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
Well let's start with the fact that despite the complete lack of any announcement whatsoever and no update to the website, SuperTuxKart 0.3.0 is available for download and has been since the 5th July. Well, I'm doing the announcement for them it seems.
This Super Mario Kart inspired game is available on all popular OSes - Linux, Linux PPC, Mac OSX, and Windows. There's quite a few new features in this release that is a massive improvement over version 0.2: