Had responses to RB's for Christmas Eve (today) and Boxing Day, not yet for my Christmas Day RB.
However, I did a search for WG's who have paid for the "Available Today" sign to be up tomorrow and 85 showed up in the UK, 35 of which are commutable for me - assuming they have actually done this deliberately and really are available. Just go to the Rates and Availability tab of the search and put in tomorrow's date at the bottom in the "Paid Availabilty Date" field.