Penguicon 6, the Detroit-area science fiction and free/open source software convention, is coming up soon! The guests of honor include Vernor Vinge and Jono Bacon from Canonical/Ubuntu. I attended one of these a couple years back and had a high old time: open source and science fiction go together like peanut butter and chocolate.
Tech Guest of Honor: Jono Bacon, Ubuntu Community Manager for Canonical
Tech Guest of Honor: Benjamin Mako Hill – Debian/GNU, MIT Media Lab, Free Software Foundation, Ubuntu, Wikimedia
Author Guest of Honor: Vernor Vinge, Multiple Hugo winning science fiction author, computing visionary
Author Guest of Honor: Tamora Pierce, fantasy author, co-founder of Sheroes Central
Webcomics Guest of Honor: Randall Munroe of xkcd
Gaming Guest of Honor: Keith Baker, creator of Ebberon world for Dungeons and Dragons
Hack of Honor: The Giant Singing Tesla CoilsApril 18-20/Troy, Michigan
(Thanks, Peter!)