Rails 3 in a Nutshell

What's happened to Rails 3 in a Nutshell? It's got an estimated publish date of March 2013 now and yet I see that I pre-ordered it from Amazon in February of 2010. It's a real shame. Really just wondering if you have any details of why it's taking so long and sort of hoping that the March 2013 date is a mistake... Rails 4 may well be out by then.
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