Sadly the DevRoom is limited to only a single day this year, namely Saturday. This makes scheduling kind of tight, and the massive ARM GPU driver block was partly moved to a mainline talk to relieve this scheduling tightness.
https://fosdem.org/2013/schedule/track/xorg/
For more information about the FOSDEM event, there's always the FOSDEM website. It includes city maps, information about transportation and a list of hotels.
If you would like a complete overview of FOSDEM, then maybe last years site will be of interest.