So I decided to see how big of an image I could throw. There's the result.
It's about 8 feet wide. That means it's the equivalent of a good 110+ inch TV. There is a Canada Dry can set against the wall, on the lower-left corner of the image. When I took this picture, my computer wasn't set up correctly at the time, so actual coverage area is probably wider by a foot.
The problem with this setup? If I really want to use it, I'll need to either arrange a more comfortable chair next to the microwave... or.... I dunno. Also, my DVI to HDMI cable is short. And the positioning of the projector (and lack of nearby table space) makes picking a permanent laptop placement position difficult.
I'm going to pick up Halo 3 tomorrow and see how/if image quality changes when I plug in the XBox (using Component Video, I guess? I don't think it comes with the HDMI plug... I might have to invest in the adaptor/cable?).