By soon you mean in the 3.2.x-release series? We still need this feature badly and recently tried a workaround: To create a new user and invite this user (called "Conference-room") to meeting that is supposed to take place in the conference room.
The problem with this approach is that people (having of course their own account) have to log in with this conference-room account to accept the appointment. As far as I figured out, it is not possible to accept an invitation for someone else even though you have write permission to his calendar (which would be a cool thing and only require an email-forward).
So, when is soon?