Led by Barack Obama’s acceptance speech and other coverage of the Democratic National Convention, CNN took the top spot and seven of the top ten in this week’s top twenty. Fox News’ best placement was at number 12, though FNC took two other spots in this week’s top twenty. MSNBC’s best placement was thirteenth, it’s only spot in the top 20 (or for that matter the top forty). Racking up over 7.4 million viewers, The Closer took the second spot.
I’m not sure if WWE RAW really ran on SciFi on 8/25 (something seems quite appropriate about that and NBC Universal owns both SciFi and USA) but that’s what Nielsen listed in the spreadsheet. While ranked 33rd out of 40 shows on a households ratings basis, because it gets more viewers per household, it shot up all the way to number 15 when ranked by viewers. Update via commenter Bryan: It did run on SciFi because US Open Tennis coverage aired on USA Network, though it also aired delayed on USA as well.
A sampling of popular shows not in the top 20, but among the top 40 (we’re limited by Nielsen to publishing tables of only 20 shows, sorry!) were Disney’s Wizards of Waverly Place with 3.739 million, ABC Family’s Secret Life of An American Teen (3.649 million), Bravo’s Project Runway with (3.547 million) and a slew of SpongeBob and other convention coverage.
Full Top 20 Cable Results for the week ending 08/31/2008:

TNT’s The Closer again dominated the cable viewing universe, having over 2.5 million viewers more than its nearest competitor, WWE RAW. TNT’s Saving Grace was actually ranked second based on a household ratings basis, but slipped to third when it comes to viewers because more people per household and/or screen watch WWE RAW.
Dang, who knew!? I mean I was all over a marathon weekend of catching up on season one of Mad Men and its season two premiere on Sunday night (2.1 million viewers in the final tally), but completely missed out on Next Food Network Star which pulled in 4.5 million viewers on Sunday and cracked into the top 10 for the week.