btw this post reminded me, google search is now picking up things that you look at for just a couple seconds and then google. Example here, I wanted to look up something about that show, and it came up when I typed "Han." I think they must do it with a temporary html cache so it can quickly compare your typing with the text from where you were just browsing, which would be pretty simple, but it's a little freaky that it's effectively done in real time. I like it because it's really handy, but I hope it makes people feel very paranoid.