Rob O’Hara recently finished an IF game in Inform 6 called Hangar 22. It’s got about an hour or 90 minutes of gameplay and in his words, he was shooting for more “text adventure” than “interactive fiction.” I don’t believe it is on the IF Archive yet, but here is an URL for the .z5 file:
I’m enjoying it so far. Even though this game starts out in “my crappy apartment mode”, it’s still one of the most convincing of that environment that I’ve played.