I've happily used "mstsc/console" for years now to connect to the console session on windows 2003 servers. I recently downgraded from Vista on my new laptop to good ol' XP pro. All great apart from the fact that "/console" no longer works. Now I have to use "/admin" instead. Maybe I'm just thick but isn't this a bit odd?
A cool thing one of my team at work discovered the other day is the qwinsta command to query terminal server sessions and also the rwinsta command to reset sessions remotely or locally. Very handy, especially if you have naughty admins at work who don't clean up after themselves (and you cant be bothered faffing around with policies to kick them off automatically). See this article for more info.