A number of folks working on various WebGL implementations are on IRC, on the Freenode network in channel #webgl. Feel free to join us! A server list can be found on http://freenode.net/, or you can just try irc.freenode.net.
If you don’t have an IRC client, head over to http://webchat.freenode.net/
Enter your nickname in the nickname field and write #webgl in the channels field, then hit “connect”.