NFL Network's Total Access is broadcasting live, and reporter Scott Hanson is roaming the sidelines for the latest. You can watch either of those camera feeds live or watch the prospects go through the various stations by choosing one of the five camera feeds at the top of the page.
The offensive linemen are finishing up with the 40s, while the tight ends are in the opposite end zone stretching. On the near side of the stadium, the section that sits closest to the finish line of the 40-yard dash is entirely full of team officials with stopwatches, getting their own times for the prospects. It's basically a who's-who of coaching.
Long and short of it
LINK:http://www.nfl.com/combine/live?icampaign=MB_ComTomIt's actually better coverage online, you don't get commercials and can choose your camera angle.