I do like the SlingPlayer for the iPad very much as long as you’re on your home network. But I find using the old Slingplayer for the iPhone/iPod Touch on the iPad more usable when trying to use AT&T 3G networks.
For a first version this is a nice app. In my metro Philly area I am able to use it very effectively to change channels and set recordings without issue. The filter for sports and movies comes in handy. They need to add a quick jump entry so you don’t have to scroll down to get thru the 800 channels. Can’t wait till I can watch the shows on my iPad.