There are plenty of good shoe companies out there that make "walking shoes." I bought a pair of these, thinking they would be good for work because I know that some day my old reliables are going to start looking too crappy. I need "standing shoes." My old reliables are a pair of Rockports that have a nice springy thing built into the sole, and provide some cushion -- kind of like those pads we have down on the floor. I've also outfitted them with a cushiony pair of arch supports. They're awesome, if dorky looking. But of course I can't find this exact style anymore.
The new walking shoes I bought have good support and everything but the bottom feels hard as a rock compared to my old ones. I can really tell the difference in my knees at the end of the day.
Standing ALL day -- the bane of our existence. If anyone reading has a good shoe recommendation -- I'll take it !!