@members.bitcoin.org or @users.bitcoin.org would look more professional than @bitcointalk.org
That's exactly what I proposed to Sirius. I think anything less than "members.*" would leave too much room for fraud.
@admin.bitcointalk.org
@moderator.bitcointalk.org
@donator.bitcointalk.org
@member.bitcointalk.org
Those could be epic. I'd pay for it even if it was just forwarding to gmail