My friend Brian Button is still looking for St. Louis Code Camp speakers; if you’ve thought about giving a user group talk, this is a great way to get your feet wet. A “code camp” is an informal event, likely with a lot of group discussion. You don’t need a large topic or a long speech. Simply pick a technical topic (perhaps something from your work, or something you’ve been wanting to learn on the side), prepare a few examples and notes, and sign up.
I’m already signed up to give a talk on Lua.