You may not have heard of Wayfair, but neither have a lot of the people who've turned the online purveyor of home goods (faux florals, ceiling fans, fire pits) into a nearly $1-billion-in-sales business. CEO Shah and his Cornell classmate Steve Conine started out with racksandstands.com in 2002 and quickly expanded, buying dozens of niche domain names and launching many from scratch—simplydogbeds.com, justshagrugs.com, dinnerplates.com—and in 2011 changing the company name from CSN Stores to Wayfair (700 employees went on a Boston bar crawl in Wayfair T-shirts to help market the new name). Today under three main sites—Wayfair, flash-sales site Joss & Main, and the higher-end AllModern.com—it's the biggest online-only homegoods seller, and this summer it acquired New York retailer DwellStudio. The Boston business community is keeping close watch for an imminent IPO. We bet Jeff Bezos is too.