Currently the only server is me. Type
ftp://24.151.208.144 under server under the internet sharing part of the options screen. I try to keep the server up all the time, but random errors may keep it down until I turn it on again. Expect it to be up 80-90% of the time.
The folder option will select an internet sharing folder to use. The default is darwinftp, which is for all different kinds of bots you'd like to run. From time to time other projects may develop, which use different folders.
Nickname doesn't matter for login, but helps others see where a bot they downloaded came from.
Two gates will appear during the sim. The one in the bottom right corner is the download gate, where new organisms from the sim are loaded. The one in the upper left is the upload gate, where organisms are uploaded to the server.
Be sure to check it from time to time, as even a single bad connection attempt will turn off internet sharing at the moment.