I used it with my NEC LT150 projector, to watch local channels from my antenna, and Dishnetwork (thru s-video). It looks a lot better using the ViewBox scaler/de-interlacer, than it does using the internal scaler/de-interlacer of the LT150.
I know of people using the Viewbox with their AE100's, a native 16x9 LCD projector (848x480), with good results.