Videogames, Consoles & Accessories remains one of a handful of high-performing online retail categories, rising 73 percent in Q2 vs. the year-earlier quarter on the strength of consoles like the Nintendo Wii.

Furniture, Appliances & Equipment (up 65 percent) was another top performer, while Home & Garden (up 23 percent), Event Tickets (up 22 percent), and Sport & Fitness (up 21 percent) also performed significantly better than average.

But some categories, including Flowers, Greetings & Miscellaneous Gifts, Jewelry & Watches, Computers, Peripherals & PDAs, Toys & Hobbies, and Music, Movies & Videos, recorded year-over-year declines.