(out of the box) defrag map support, now in trunk!
The code learns which path you take, stores that in a file and uses that in the future. This is because defrag checkpoints aren't ordered in any way, but the Nexuiz code assumes they are.
Here's an example of a map that was "automatically" waypointed by players on the [NL] Nexrun CTS server (also the current server record

):
http://www.youtube.com/watch?v=kx6irvCCmwI