Currently my router is sitting on the floor.  Not the best location.  My house is 2400sqft, 4 levels.  Each level is more of a half level (each level only taking up a small portion of the 'earth footprint').  The floor/level that i would like to mount this is sort of a middle level.  I am wondering what mounting this router 'upside down' to the ceiling would do for reception?  As long as it doesnt decrease I am good.  Most of the internet use is web surfing (3 kids, 3 TVs, and 2 adults).  I am a full time remote worker for instructional design/development (plus educational game dev).  My development computer is connected via one of the gigabit wired ports out of the router.  So I am not worried.  

You see wireless nodes connected to the ceilings of many office complexes.  I only question this as the A20 has antennas that point UP when the box is sitting correct.