The 6th Annual Interactive Fiction Competition is in full swing! Pick up this year's entries and start plowing through them. A rule of the competition is that a game/work should be 'solvable' in less than 2 hours, so too much isn't expected of judges. Good thing, too, because there are 53 entries this year. Vote for some, vote for all.
I keep meaning to enter, but I keep forgetting when the deadlines are. The prizes are always cool. Develop early and you can get the IF community to test and debug for you. Completeness is key to having a solid work of IF, which usually means having reasonable responses to input that you originally didn't account for ("draw curtains," for example). Testers are to your interactive fiction as readers are to a preview draft of your novel.