From http://www.barcampboston.org/
The event is free and open to anyone, but you don’t just attend a BarCamp — you can host or participate in discussions, demo your projects, and meet other techie, geeky people like you.
BarCamp Boston topics include: technology, marketing, food-science, startups, sci-fi, development, social media, gadgets, communities, design, hardware hacking, UI design, entrepreneurship, AJAX, open source software, robotics, art, mobile computing, bioinformatics, RSS, social software, programming languages, the future of technology, and much, much more!