[Steve in Pudsey]

If memory serves for an average Premier League game in 3D, I recall reading that they needed an additional entire camera set up just for 3D.

Yes it was almost an entirely separate OB with cameras on the opposite side of the stadium to the standard coverage. This also meant a separate commentary team.

I watched one of the games in a local pub and found it pretty underwhelming. Lots of close ups to make the 3D effect work but that make it harder to follow the action, I didn't find it added much to the experience.