2012 models will be announced at CES (most likely) which is in like 3 weeks
new models will generally become available in April/May some take longer and come out in June/July - these are normally the larger ones.
however last year they seemed to have a good stock of every size pretty early.
Once anounced did the 2K11's drop in price? I might pick up the 80" for ~3K, never more than that.
