Just chipping in to agree with everything Gordon says.
I'll also recommend not going down the charity route as was suggested earlier - completely unnecessary and adds a huge amount of legal requirement, responsibility and just plain boring work. As someone whose family started a successful charity that took over all our lives for three decades and is still going strong without us, I can say I have a little experience in this, and in watching what was one a fun and enjoyable thing turn into something that was at times extremely bitter and divisive.
A small lug does not need any kind of formal arrangement and I strongly recommend fighting to keep that. Focus on what brings you together, linux, and only that.
Keep it small, keep it loose, keep it friendly.
