Online sales still represent about 2 percent of total retails sales. So there's a lot more room to grow.

This year online shopping has gone mainstream, where we're seeing a greater percentage of consumers from different age and income demographics buying on the Internet.

Today, to compete anywhere, you have to be everywhere. Wal-Mart and Target have joined Amazon and eBay as the most heavily trafficked e-commerce Web sites, and chain retailers account for about 40% of online sales, compared to just over 25% for pure-play Internet retailers.

Thanksgiving weekend spending figures suggest that predictions of another strong online holiday season are on track.

Online retailers were very successful in attracting early holiday shoppers by offering incentives such as free shipping and discounts. However low prices may end up hurting Web merchants' profit margins in the long run.

It's obvious that the continued spread of broadband Internet access is having a great impact in driving the growth of online shopping in the U.S..