I agree Amazon should make more use of the shortcuts (and document ALL of them not just some) however since certain ones are already taken (ie Alt+Q for the number 1, w=2 etc) perhaps shift+alt+q?
I'd also really like a shortcut to get to the browser from the homepage
Not sure if you knew this but if you hold alt and use the up/down/left/right arrows it scrolls the page, might help a little in the mean time.