We're a professional group for Interaction Design, with forays into User Experience Design and related fields. All are welcome, whether you have years of experience or are just curious about making technology better for people. We serve Denver, Boulder, Fort Collins, and other northern parts of the Colorado Front Range. If you're in the southern part of the Front Range, there's also a new IxDA chapter in Colorado Springs: http://ixdacos.groupsite.com/main/summary
If you've never heard of barcamps-they're an "unconference". Traditionally, there's no charge, but every attendee is expected to participate-either by presenting (including being on a panel for discussions), or by helping organize, setup, tear down, provide refreshments, etc. It's a great way to share knowledge without having to travel (I know-takes some of the fun out of it for some folks) or incur expensive registration fees.