I've been a lurker here for a long time.Thank you for providing a great place to find intelligent information regarding e-books and e-book readers.
I think that you might find this tip interesting:
(taken from Kindle answers from the Kindle team
"Suggestion from a customer (Thank you!):
A number of people have complained that it's impossible to close the flap of the Kindle's cover without pressing one of the navigation buttons. I've found an easy solution for this: I simply put my Kindle to sleep before closing the cover. To do this, simply press Alt+AA as though you were waking it from sleep. (I wonder how many other undocumented features we're going to discover!)"