Would it be possible to have a hide/minimise button on the top bar of site/app windows? It could go next to the close 'x' button, possibly have a minus symbol and maybe have a little animation shrinking the window into the Quick Lunch to show where it's hiding to. Alternatively, flash/jiggle/highlight the Quick Lunch icon. It would have the same function as pressing the 'h' key, (or clicking the Frog Head).
This would be real nice for less advanced users.