Since we didn't manage the second summer hackfest, how about an winter one?
For me this would have to be next year; the rest of this year (weekends) are basically full up.
Venue yet to be determined, format to be about the same as the previous one.
If you're interested in coming, visit Meetomatic and tell me when (you can put in the comments whether you have a preferred location - likely to be London or Oxford) http://www.meetomatic.com/respond.php?id=BFMEDF
Cheers,
Dominic.