The secret of Open Source is that all the good things happen on IRC.
Chef is no exception - you can find us in
#chef-hacking if you already have an irc client available. You can also click on the following links for a web based irc client: #chef, #chef-hacking.
IRC Logs are maintained as well, which you can conduct a site search against for specific information from discussions on days gone by, or use the built-in search functionality.