18. Kmart.com

Customer service ranking: 18
What it sells: low-priced clothes, appliances, seasonal items
2008 revenue: $900 million
Best-selling items during the 2008 holiday season: flat screen televisions, video games, Nintendo Wii, Craftsman tools
Anticipated best-sellers for the 2009 holiday season: Barbie 2009 Holiday collector doll, Asus Eee PC 16GB netbook

Kmart.com may lag far behind its counterparts Target.com and Walmart.com, but it's still a top spot for deals on seasonal items and appliances. What's more, it now offers layaway online. The retailer, owned by Sears and based in Hoffman Estates, Ill., re-launched its e-commerce site in 2004.