That's what I was thinking. Every time you visit a node, couldn't you store the nodes below it locally and if you revisit a node base your CSS on your own data of read nodes? Seems like something that could be hacked together using GreaseMonkey or a Firefox extention.
Revolution. Today, 3 O'Clock. Meet behind the monkey bars.
I would love to change the world, but they won't give me the source code