http://www.diyaudio.com/wiki/index.php?page=Video

http://www.google.com/search?q=diy+home+theater+screen&sourceid=mozilla-search&start=0&start=0&ie=utf-8&oe=utf-8

LiquiScreen - special paint for wall screens

http://www.liquiscreen.com/

Goo Systems - paint for wall screens

http://www.goosystems.com/

Cinema Dealer - screen material by the sq foot.

http://www.cinemadealer.com

DIY project pages:

http://members.shaw.ca/danhanson/Theater/screen/screenproject.htm

http://www.myhometheater.homestead.com/screen.html - used Goo