I want to hook up a Sling Pro-HD to a 722...My question is does the 722 allow for both the HDMI and Component video outputs to be used at the same time?....I have the HDMI to the TV and the component would go to the Sling?.....also does anyone have any comments on how well or bad the sling pro hd works with the 722...thanks

Yes, all outputs are live all the time.

also does anyone have any comments on how well or bad the sling pro hd works with the 722...thanks

I have a sling box (although it isn't an "HD" slingbox) hooked to my 722k and it works well. It depends on your connection speed, but mostly I can navigate through all functions just like I was sitting in my iving room at home.

I was told by tech support it would not work. I tried it anyway and it works great. I have HDMI to my Denon receiver and the composite going to the Slingbox.