Hi mrbowman,
Are you following
this thread?
We seem to have narrowed down the battery drain during sleep mode to the screen being touched while the device is going to sleep. So if you have a case/cover/sleeve that touches the screen, this will cause the battery to drain. It is probably a bug in the new Touch/Glo firmware as the older model Touches don't have the problem.
The work around is to wait before putting the device in its sleeve or closing the case. So, when you're done reading, put the device to sleep with the slider, then WAIT, at least until the screen has finished changing and the sleep screen is visible. And only then close the case or put the device in the sleeve.