Chips
...or a lack of them, depending on who you are.
By the by particular kudos goes to Richard Ashby - he's managed to keep his stack at 13,400 despite actually playing the $10,000 HORSE final table for most of today. He might yet blind off though - there's only so many hands you can play during a 20 minute break, and even so that's only if you have a bladder of steel.