1152x648
I am using the 50 inch Sony LCD TV in my living room as my monitor.
At first it was like 'wow'
Now when I use an actual monitor its like, damn this is too small...
If you have the connections on your video card, and an LCD TV I suggest you try it. However a word of warning; use your TV's native Resolution which can be found online under specifications. Using non native resolutions over any length of time, can cause serious damage to your display (or so I have been told).