For all our motors that aren't on the drive train we use this wire.
http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10239&cs_id=1023901&p_i d=2817&seq=1&format=2
It's really cheap and if you pull it out of the sleeve it looks like normal wire. We rarely leave the sleeve on but it helps in some places. They also sell large spools of 18 AWG which we use to wire everything that's not motors. We use standard 10AWG from the kit or radio shack for our short drive train wires.
Speed controller power connectors use these
tabs and these
crimp connectors.
We use Anderson power poles for most of our motor wiring. We order from Allied electronics normally because they are in Texas so it's faster shipping. Powerwerx is a good source as well.
Cable management is all zip ties, Fry's carries them in purple in bags by the 1000 so that's were we buy them.
4AWG/6AWG wire comes from
Emergency Electrical Power Systems
That's about all I can remember right now.