I feel a little silly posting this, but since Andrew posted about Interactive Fiction Writing Month, I figure I'll post my entry.
The first week's assignment (after getting the compiler running and reading through some tutorials) was to create a few rooms with a few objects in the rooms, using at least three different attributes (scenery, container, light, etc.).
I have some programming experience, but I've never played with Inform before, so I kept it pretty simple. You can play it online here (thanks to the Parchment web-based Z-machine interpreter). It's just a few rooms, but there actually is something to do, including a win condition. Note that it hasn't been tested much by people besides me, so it may behave weirdly.
I'm happy to hear your thoughts about it, and I'll be posting each week's assignment, which should culminate in an actual playable game.