http://www.megabit.nl/ and
http://burningdork.slab.org/ I express no particular preference. I'd like to go, but I'd like a pro-touring HemiCuda, too. My impression of the megabit tent at WhatTheHack was that it was more LAN-party than activist, but I'm prepared to be cheerfully wrong. The talks seem to be shaping up interestingly, but I don't know what language they'll be in.
The other one's going to be run by English people. Expect long queues for rubbish bogs, no on-site LAN or power to the tents.