The Toia Project has just announced that it's long awaited QTI assessment software is ready for beta testing with the wider HE community.
http://www.toia.ac.uk/toia-press-release-2004-04-07.html
Presently, interested parties can sign up for testing on the projects own server and then later the system will be available to be hosted within institutions.
The JISC funded project is presently free to all UK HEIs. As Computer Aided Assessment is one of my interests I'm certainly very interested in how this software works. Watch this space.