I'll contribute to costs. Would love to see something up and stable for everyone in the WordPress community to join.
Extendable would be good. Whatever we do we want to prepare in a way that we can add mods to in the future. Or at least be able to lift the world up and place it onto a new server if it becomes time to move. Not sure what we have to look out for. But whoever wants to take the initiative on this I'm supportive, and looking forward to it. Today, tomorrow, next week.
We can name it wpchatworld or something to give it a home feeling, and we can keep the access information posted here.
If anyone wants to private message me and bounce obstacles and ideas off me please feel free, or post them here.