Hi all
This is just a short post as I have to rush out, but I thought I'd let you know that I've just released version 0.1 of Vent - and events system that uses Scheduled posts within WordPress.
It is fully WordPress MU compatible.
More details here:
http://blog.clearskys.net/2008/07/09/vent-version-01-released/
and
http://blog.clearskys.net/plugins/vent-events-system/