Looks great, is there any other syntax available for more elements than what I am seeing in the docs/example? Either way it looks like a good way to get the basic elements down before editing by hand.
Echoing the other comments, draw.io is fantastic for making state diagrams. Easy to use and lots of features!
The rack diagram is pretty nifty. Too bad it doesn't have my Sun Fire T2000 in it, though :(
Draw.io is amazing. Thank you for the work you put in it.