I am wondering about the timing of a 2012 bid.  I have organized some conferences before, and in my recollection, getting the timing right -- being able to sign the contracts at the right times, when one is able to commit, but as early as possible -- is critical. 

I am a little bit worried that a bid for 2012 is not going to happen until February 2011, and that we are not going to hear back until (likely) April 2011.  This means that from the time we hear, to the meet-up, there is barely over one year.  This is not much time for locking down space for 800 people.  Especially, the earlier we are able to commit, the better conditions we may be able to extract.  For other conferences I am involved in (academic-type conferences), the steering committees try to plan 2 years in advance at least. 

Concretely, I talked with UCSC, and they told me that they would have lots of possibilities open for 2012, but time for 2011 is tighter; they would have more constraints for space and time available.  We are asking for a lot of meet space (some place where to meet in 700 people or so, plus 8-10 separate break-out rooms for 80 people or so each, would be my guess), and a lot of space for attendees.  So now we are in an ideal position to enter a committment for 2012, but if we wait until 2011... who knows? 

Also, I am unsure about the logistics of a bid.  We send a bid with what kind of agreement with the venue? 
Other thoughts?  This timing issue is, in my opinion, one of the hardest...
When I organized my previous conference (hey, the site is still there: http://concur05.soe.ucsc.edu/), I at least knew it would surely happen in San Francisco, before I started signing contracts. 

Luca