Chrome Version: 10.0.612.3
Operating System: Mac OS X
Adblock Plus version: 1.0.24
EasyList by Michael, Ares2, Erunno, Khrin, MonztA
Recommended filters for Google Chrome
As shown in the above screen shot, cnet.com has a Dell ad near the top of the home page.
Using the Chrome element inspector, I found that this ad was within a div called "madison_ad_154_100", so the following filter removed it.
There might be a more efficient filter or a better way to block it, but I guess this might be a good starting point. This ad is blocked with Adblock Plus in Firefox, while subscribed to the easylist.