I thought the Sienna Hotel went bankrupt sometime after the 2008 stock market crash...
They did, but apparently they're back open and accepting reservations.
http://www.sienareno.com/
Perhaps the Siena is under new ownership?
Was a very nice place when it first opened.
It was indeed, and according to the linked website it still is. However, in my opinion one could get a lot more bang for their bucks at Eldorado, Grand Sierra, Peppermill, or Silver Legacy.