It's been about a week since Mitt Romney's campaign launched the most interactive experiment of any we've seen come from the Republican side of the presidential field, calling on their supporters to submit 30- or 60-second TV ads, mashing up a rich array of clips, audio and photos provided by the campaign.

It's a smart way for the campaign to engage grass-roots supporters, and to also erase any memories people may have of Romney's reluctance to participate in the Republican YouTube debate. And, as a number of observers predicted, it's also a bit of a double-edged sword.