im not sure but i think they haven't made an ipad version yet... though i know, the iphone apps works with the ipad, it might have something to do with the video quality of using 2X zooming on the ipad that would render the video useless...
I wonder if it will work with the 3G. The common ground between MobiTV apps seems to be the cellular carriers. AT&T carries the iPad3G as of later this week.