I noticed something interesting when I visit the Chronicles of George forums. If I browse the boards at home and then look at them later at work, the board remembers what I have seen (i.e., no star next to messages I read at home), even though I'm looking at it from a different computer.
It's probably not completely cookies -- must be something server side, though damned if I know what. But it's pretty cool and very convenient.
The whole little Avatar thing is cool too, especially since it wouldn't suck up your bandwidth.
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...Trot and Cap'n Bill were free from anxiety and care. Button-Bright never worried about anything. The Scarecrow, not being able to sleep, looked out of the window and tried to count the stars.