Microsoft's slowed the pace of Windows Phone 7 ads after saturating the airwaves at launch, but it looks like another campaign is about to begin -- WinRumors has a leak of a new set of "Real Time Challenge" interactive web ads that challenge you to complete tasks using your phone against a WP7 device. Challenges include taking a photo and posting it to Facebook, checking Xbox achievements, getting directions, and telling meeting participants you're running late. Not surprisingly, the WP7 device performs handily at everything -- although we're definitely wond
