Kind of odd. A few days ago the IHG website showed 100% availability (paid and points) for the next several months. I was about to book for this upcoming weekend, but now it shows no rooms available on any date for the next several months, regardless of whether you are paying $ or points.
A quick google search shows the rooms as bookable via any 3rd party travel agency, as well as via the Venetian website (venetian.com) where they appear to be TRYING to sell as many rooms as possible via discounts and credits. A bit weird...