...the Warsow Racenet is dead - unfortunately.
Update Nov. 2014: The Game itsself is still alive: http://mgxrace.net
Also there seems to be a more up-to-date version of the Game-Code:
https://github.com/kalhartt/racesow
We won't come back if YOU don't get in touch with all the work required to do so.
You can find the code for the Website and the Game here: https://github.com/racenet
Add me on facebook if you have any questions: http://fb.com/andreas.spekta
PS: I started the project Racesow2D for Android which is already playable but discontinued aswell.
The code is here: https://github.com/zolex/Racesow2D