Beyond discussions, here we can use web pages to: 

• Drive consensus
• Develop "potential" documentation and host "working documents" rather than formal documentation
• Define terms in a more detailed, metaphorical, or visual way than is typical in documentation
• Be a first place for to look for answers, which also has some structure, rather that searching the endless discussion lists

As we get started, we can chat on IRC too. The squeak irc portal has info on how to access the irc network:
http://wiki.squeak.org/squeak/IRCPortal    just substitute #squeak with #croquet and the instructions still apply.