Heads up! Writeboard is finally
on the way here!
UPDATED: And here she is: http://www.writeboard.com/ Looks like the guess was pretty close.
But I'd be willing to bet that it's highly similar to JotSpot Live and Writely. We'll find out next week if I am right. Maybe once it's released, I'll finally write up the review/comparison of these SubEthaEdit-style apps that I've been meaning to get to for weeks now.