A quick newbie iBook user?. If I sleep the iBook instead of shutting it down, how long is the battery good for? I have been turning it off, but then I don't like waiting for the restart cycle if I have to turn it on again 10-15 minutes later. Is it OK to transport it in Sleep mode? I have been losing some stratup items on reboot, even though they are in the log in items, so I don't like firing them up again either. Any help would be appreciated.