A new feature on Facebook lets viewers rate the ads they see up or down, which will supposedly tell the social networking site which type of ads they're more amenable to. (Of course, you could vote down all the ads, which would be fair, because they're all pretty terrible.) Except the feature is only available to a select few in Facebook's test group, so it's likely most of you will have to suffer through a News Feed crammed with Blockbuster pitches with no recourse. [VB]