It just come out - Stack Overflow DevDays conference will be held in couple of cities:

October 19 San Francisco
October 21 Seattle
October 23 Toronto
October 26 Washington, DC
October 28 London

We Europeans have only one choice- London. I have already make a reservation and so should you! I believe this will be great conference.

Right now about 2h after Joel's announcement are 231 and 14 tickets available of 300. In less then one day there will be none, when it seeds out (what I am actually doing right now).