Well, if I were to have both on my setup it would be like this
Please excuse my text, I have no tablet.
That basically is how I've ran my setup before, but instead of the large LCD TV over the triplhead I use a 720p projector. It works great imho. I was gaming on the triplehead and would be watching HDTV overhead from my cable box and other inputs. At the moment I have the projector mounted long throw on another wall in the room full wall size though instead of just over the desk. Both ways are great. I like the wall sized projection lately though. I don't think I've kept any of my old photos of that layout, but I have posted them to old threads on other forums about a year back. I can go dig around for a few pics I guess.
EDIT: Ah hah! I knew I had a thread someplace on it triplehead 17" waaaay back in January 2007:
Thread: http://www.widescreengamingforum.com/forum/viewtopic.php?p=80001&highlight=#80001