>I suspect it needs some word-wrapping: the 'available' has been overwritten by the P-state heading :)
Since it always says that, no matter how wide the terminal in which it's run, you'd think somebody who knows that the message has been truncated would have noticed at some point and fixed it. I just assumed it was a message in some arcane code known to those deeply involved in power usage monitoring :P.
Anyway it's unfortunate that desktop CPUs don't support this - even the Atom (D510) I bought a month ago only supports C0 and C1, and I don't know if it's possible to tell how long it's spending in what state. It seems you need CPUs designed specifically for battery-powered devices if you want anything more.