Sean (et al)
Per our discussion with Nancy H during CLD Summit, I've been playing with some UML editors (just googled). Thought I'd share. I liked this one because it was quick and simple. It's a Java app, hope that's not too awful.
OOPs - forgot the link hopefully it's here this time: http://alexdp.free.fr/violetumleditor/page.php
I tried doing her UML tutorial in a diagram, see attached.
Maybe you could share with Steven, Derek