This month we're hosting a Show and Tell meetup, what this means is that you should have a demo you can show us. We'll accept even a hello world demo in play.rust-lang.org or a running version of servo. Anything is permissible so long as it's Rust related.
Your demo doesn't have to last very long (but let me know if it's longer than 10 minutes so I can schedule around the shorter ones).
If it's a project, it doesn't even need to be a fully working prototype.