The 20th sounds fine to me, and I've no kids to contribute :) Hopefully
we will hear from Ryan (and anyone else lurking who would like to come)
soon. Regarding the location, if there are any other partners and/or
kids coming then having it at our house would seem a good social option,
but if it is only Mozillians and no +1s, then I'm sure my wife would be
more than happy to leave us to our (inevitable) geek talk at a
restaurant or similar. So try and coax respective partners into coming
and we can decide a venue based on the success of that endeavour :)
Mark