If you are going to NN09 in Pittsburgh next month but don’t have a place to stay yet, I am considering looking for a roommate to save costs. I have a reservation at the Westin (the closest hotel to the convention center). The hotel room block is sold out now (as is the whole hotel, I believe).
Get in touch if you are interested. I have the room for four nights, arriving Wed. evening, departing Sun. Half the cost (incl. taxes) would be about $340.
Sorry if this is diary abuse … I had good luck here last year for Austin, even if it look a while.