You're about to see a lot of political TV ads in the US (if you haven't already), and keeping tabs on them is going to be... difficult. Who paid for which ad, who are they attacking, and who's playing fast and loose with the facts? That's where the Internet Archive wants to help. It's launching a Political TV Ad Archive that will use audio fingerprinting to track federal campaign spots in 20 markets spread across eight states. In addition to preserving videos, the collection will include info on where and when the ads have aired, their sponsors and their targets.