Online retail spending topped the $100 billion mark last year. According to comScore, the top ten retail web sites were:
above data from
It is interesting to see shopping visualization services being launched to make this rapidly growing market a better experience. mentions two of these BrowseGoods and BlackDogAir. I love the interfaces of both these sites. BrowseGoods provides a browse experience akin to actually shopping at a store and BlackDogAir creates trees of related products.