36% of American homes own at least one digital video recorder (DVR)

"New consumer research from Leichtman Research Group, Inc. (LRG) found that 36% of TV households in the United States have at least one Digital Video Recorder (DVR) -- an increase from just 8% four years ago.
In addition, 63% of all digital cable subscribers have ever used Video on-Demand (VOD), with 88% of this group having watched an on-Demand program or movie in the past month. Overall, about twice as many cable subscribers have used VOD as four years ago"
Source: Press release from Leichtman Research Group Inc, 10th September 2009