FOSDEM (Free and Open source Software Developers' European Meeting) is probably the biggest non-commercial event where FOSS enthusiasts, developers and users meet every year. This year it takes place on the 4th-5th February, in Brussels (as usual).
It is since long that I'm trying to go there, but for one reason or another I never managed to. This year I have one reason more to go there and, indeed, my flights and rooms for FOSDEM are finally booked!
The reason is that many FOSS game developers set up a devroom for the 5th, where they will talk about issues related to FOSS game development. I definitely want to be there and to listen to the BfW related talk, in particular!! :)