Mary Jo Foley isn't 100% reliable. I can't comment on whether she's correct about "Breckenridge" or not; I will say that that screen shot she posted is probably behind an NDA ...
Aurora is intended to be an intermediate product for small and micro businesses, positioned between Vail and SBS 2011 Std. Just based on what M.J. has posted the "Breckenridge" product might not be available to the public at all; it sounds like the sort
of thing that Microsoft would market only through OEM partners a la Storage Server, with no system builder channel.
That blog post Christian linked discusses pricing; interestingly, the
official announcement of Aurora doesn't. I wonder how close M.J. is? :)
I'm not on the WHS team, I just post a lot. :)