by Erin McDermott. Nick Loper is a mover and shaker at his home office. Actually, these days, mostly a mover. Back in December, he found a treadmill on Craigslist, and with a little DIY derring-do, he rigged his workspace to it. Now the CEO of ShoeSniper.com is walking 8 to 10 miles a day while he runs the shoe-shopping website from his place near San Francisco. He’s had to learn to steady himself while walking and typing, got a bigger computer monitor that was easier to see at the top...