Hmmm... the DIY screens are getting more and more interesting. The latest is a thing called "Black Flame Light Fusion" -- looks like the Light Fusion design tweaked to (a) work better in high ambient light, and (b) work pretty well without a mirror.
The screen shots are alarmingly good. Nice, typical daytime shots of living rooms with windows open, daylight streaming in and lights on... with this blazing projector image in the middle of the wall, from run-of-the-mill projectors running on low power.
Wish I hadn't seen that
http://www.avsforum.com/avs-vb/showthread.php?p=8161338#post8161338
