I may be wrong… but it doesn't seem the date has been
officially announced yet when (or where) the conference is going
to be in 2012.
I'm pretty sure the dates have appeared on this list a couple of
times (there was an NZNOG / LCA comparison from Simon Lyall, which
seems to be absent from the archive, and at least one other) - it
will be the week 23-27 Jan 2012.
Venue decision is pending, has gone upstairs to the TMO .... an
actual official announcement will be made very very soon.