Ben and I were at arsDigita two-three weeks ago, and Adam Farkas
kindly booked us a room using the aD web-based booking
module/corporate calendaring module.
Which is NOT part of the ACS at this point.
We were kinda going like "hey, why hasn't this been released, people
would love this" and the response was that no one had had time to do so.
You might ask your question over at web/db, though since several aD
folk (including Adam) monitor this forum we might get a response here.
If aD were to make the code available, but not neatly packaged up etc,
perhaps a volunteer could be found to port it and integrate it with
the existing OpenACS release?
(hint hint to all concerned)