Well here's the answer they sent me:

Hello and thank you for your email.

The 2009 Dream Home Giveaway is just that...a dream of lifetime. It?s an opportunity to own the home of your dreams. And this year's Dream Home is yet another incredible home by the Dream Home Team; a classically styled farmhouse located in beautiful Sonoma, California.

While it is true that some previous winners have made the personal decision to sell the home for various reasons, they have in turn used the opportunity gained from winning the spectacular home to fulfill their other dream projects. Whether they sold for tax reasons or not, each made a personal decision based on their individual situations.

For information about the amount of taxes that may be associated with winning this Dream Home, we recommend that you consult legal counsel for advice based on the approximate retail value of the prize which is provided for in our Official Rules.

What else they didn't answer:
What are the association dues for Armstrong Estates?
and
What are the property taxes for this property?