Does it work? YES! and a huge thank you to the developers.
With a small investment in time and some application of critical thinking skills one can have a reliably functioning multi-domain Joomla website.
I am amazed at those that would snipe and complain about this component. Grow up and write a better implementation or pitch in and help the developers. How about spending your time and energy to do something useful. I will not hold my breath.
Thank you again!
Thanks for your criticism and for the suggestions.
I agree with all of that. Note that the need of multi site design had been discussed by a Joomla working group (http://docs.joomla.org/Multi-site_Working_Group).
Multi domain support is a frequently desired feature. I would do my part to work for that goal. But I have not really enough time to provide serious and permanent support.