Forgive me if you guys have seen this already, but I didn’t see a topic for it:
http://upnotnorth.net/2010/10/29/a-new-way-to-interact-with-fiction/
I know, it’s not exactly a technological marvel, but something about the tactile fascination of watching a typewriter WRITE the IF game you’re playing is just about cool enough to justify the phenomenal waste of paper this device would generate.