Even though the bots are not yet available to play with, we can still get started with nav editing for custom maps! I've composed a listing of bot commands and the binds I use for nav editing over on the CSBot forums:
http://www.turtlerockstudios.com/forums/csbot/
A notice to all mappers: There are some new ladder entities which CSBot relies on to navigate ladders properly. If your map does not use these entities, your map will not be compatible with CSBot's auto navigation process!