Yes. At our developer's conference, we announced a browser extension for Chrome that allows you to see more detail about what ads you're seeing, where they came from—what networks—and how they arrived on your page. We're building it as an open-source tool, so that other ad networks that are also serving ads to sites and pages you're using can feed that information as well.
The direction we're heading, because we recognize that this is important, is providing as much information as possible for users around why they're seeing ads.