Well, we already have all the SSO and authentication that we need in our current setup, so having to overlay another set of credentials could be a humongous hassle, especially since the people using the conference rooms are very non-technical.

I love Google Apps, don't get me wrong, but it wouldn't be fitting in my current environment. :-)

(We might just be able to set up "dummy" accounts that nobody ever notices or deals with directly; still very intrigued by this)