Debian Conference is the annual Debian developers meeting, an event filled with coding parties, discussions and workshops - all of them highly technical in nature. DebConf 11 takes place Banja Luka, in Republic of Srpska, Bosnia and Herzegovina, from 24th to 30th July 2011. Previous Debian Conferences have featured speakers from around the world. They have also been extremely beneficial for developing key Debian software components, including the new Debian Installer, and for improving Debian's internationalization.
For detailed logistical information about attending the Conference, including directions, what to bring, etc. it is recommended to check out Welcome to DebConf11 page.