20. Buy.com

Customer service ranking: 20
What it sells: consumer gadgets, apparel, shoes
2008 revenue: $462 million
Best-selling items during the 2008 holiday season: Philips 7" LCD digital photo frame
Anticipated best-sellers for the 2009 holiday season: Asus Eee 1101HA netbook

While it has gotten a bad rap for customer service , consumers still visit Aliso Viejo (Calif.)-headquartered Buy.com for its variety of third-party vendors. Although founded in 1997, it has distinguished itself as of late with an editorial focus, including staff product reviews and blogs.