(W7x64) - x200 - Power Management Drivers?

[dansherman]

Has anyone had any luck getting stable power management drivers?
On my machine it works for a while, but after a reboot or two the brightness keys (Fn+Home/End) and the brightness slider in the control panel don't do anything.

I'm not too worried about it as I'm plugged in for most of the day anyway, but my reported battery life (with the 9-cell) is only 4 hours. In Vista it was never less than 7 at a full charge.