How do you know it was changed? Did you get a email since you were registered or something? I have not registered and now i don't want to register till I know where it is.
It says it right there in the info page of the conference -
http://bitcoinme.com/index.php/bitcon-2011/ . "Check out the NEW VENUE"
Good catch. This story says it's a venue "upgrade", but I think they're just extrapolating as Bruce has been keeping radio silence lately. I
really hope this is indeed an upgrade, due perhaps to high turnout (Bruce did say something about a plan B for the best case) and not something else.