mmm... I think I'll have to get used to it before I can say that I like it.
it's very good when you're in the main index or in one of the forum's index... but when you're inside a thread or reading posts, I find it a li'l bit distracting, since it always tries its best to stay in the top of the left side column.
What happens is every times I scroll down, like in a long thread, or in reading something that takes more than a screenful - I cant help but notice it scrolling up and down on the left.
mmm... maybe it's just me.
anyway, my hat's off to ash and the admin for thinking it up and adding it, it's an awesome addition!
cheers!