DebConf is the anual Debian convention. The following is from http://debconf12.debconf.org/
Registration open for DebConf12
The Debian Project is pleased to announce that registration is now open for DebConf12, which will take place in Managua, Nicaragua, from Sunday 8 July to Saturday 14 July 2012. The conference will be preceded as usual by one week of DebCamp, from Sunday 1 July to Saturday 7 July.
As previous years, three different registration options will be available: Sponsored, Professional and Corporate. Through the Sponsored category, the Debian Project intend to help some people attend who would not be able to pay for their own travel to DebConf. The Corporate category, with a USD 1300 (EUR 1000) registration fee is intended for those attending DebConf as representatives of companies. The Professional category, with a USD 650 (EUR 500) registration fee, is intended for any individual or company who wants to help the conference by paying the direct costs of their attendence.
It will only be possible to apply for food and accommodation grants and/or travel grants until 15 May. For more detailed information about how to register, please see the separate announcement from the DebConf team.
Call for papers
Debian invites submissions of proposals for papers, presentations, discussion sessions and tutorials for its DebConf12 conference. Submissions are not limited to raditional talks: you could propose a performance, art installation, debate, or anything else. Official submissions will be accepted until 1 June 2012, 23:59 UTC.
This year, we will continue to organize some talks into thematic tracks. If you have a proposal for a DebConf track, please contact <email@example.com>. Previous examples included Debian Science, Debian Infrastructure, and Community Outreach tracks. If you would like to be a track coordinator, please volunteer on that list. Detailed information on how to submit an event are available on the .mail from the DebConf team