|Why They're Hot:
It's so easy to shop at Zappos.com. And that remains true even though the shoe e-retailer now sells clothing, accessories, jewelry, baby items and more. In addition to standard top and left-side navigation, Zappos offers an alphabetical brand index on each page, so a guy who loves Ecco shoes or a mom who knows Heelys sneakers fit her child perfectly can go right to those brands. An "All Departments" tab in the navigation bar lets a shopper quickly find items like gift cards or sale merchandise. Fit is crucial for shoes, so all product pages show what shoppers say about whether a shoe runs true to size and how much arch support it provides. Plus, those pages offer a "don't see your size?" link: a shopper can e-mail her requirements, and Zappos will let her know when that size is back in stock.