Video below the fold. The crowd is reported to be between 20,000 and 30,000 people.
It's also on C-SPAN if you want to watch on that old-fashioned teevee thingy.
Added - click through for a panorama shot of the crowd. Wow!:
Panorama of Romney-Ryan event twitter.com/ZekeJMiller/st — Zeke Miller (@ZekeJMiller) November 2, 2012
Panorama of Romney-Ryan event twitter.com/ZekeJMiller/st