A terribly boring, but very interesting YouTube video is making the rounds--it's an interview with Jeff Jones of the Gallup polling organization, talking about their experiments this year with polling mobile-phone only households in their presidential polls. Before now, it's never been done--mobiles were invisible to pollsters. It's a small sample (they're trying it in just four states), but it's significant:
While the inclusion of cell phone only households makes little difference in the Clinton-McCain contest, it benefits Obama by a net four points: Without cell phone interviews, and weighted using Gallup's usual likely voter model, McCain would get 49% to Obama's 46% (clarification: this result combines six Gallup/USAToday surveys conducted so far during 2008). With the cell-phone interviews included, the result is Obama 48%, McCain 47%.
If you want to watch the whole video (trust me, you don't), here: