Optoma has a 100" 1080p DLP you can install right into your wall. The HDBV3100 will cost $20,000 and you will need to get a separate custom installer to transform your wall from off-white to great color! Considering 100" was reached by LCD and plasma only recently and sell for many multiples, I think Optoma's solution is not only a great deal, it makes very good use of your really big, but blank, wall. There are smaller (and therefore cheaper) sizes at 90" and 80".
Depth is 30", so your wall will need to be pretty thick. Connections include HDMI, Component, S-Video, VGA and composite. The bezel is customizable to match the color of your wall (or not match).
The display has a contrast ratio of 10,000:1, has an aspect ratio of 16:9, a pixel format of 1920 x 1080, a lamp life of 4,000 hours (not that long, and you'll need to contact that custom installer again so keep that phone number handy) and it will weigh 750lbs!