I think this is the page [1] you are looking for.
We tend to create a wiki page about a specific event once we know that
someone will attend/speak, like this one [2].
Well I consider everyone who is willing to speak about GNOME a team
> and (2) is it
> possible for your team to provide a general outline of a process non-team
> members can follow to contact your team and easily co-ordinate a GNOME
> presence?
member. Write to this list a good start, we are also quite active on
irc (#engagement).
Hm, the event wiki page are featured on main gnome wiki page [3].
> I've had some slight difficulty coordinating things in the past
> because I have to send emails to so many places, wait for responses, ask >who
> to contact next, etc :)