Mantic Games will be closed over the Xmas holiday.
From their announcement:
The Mantic Office will be shutting down on the 23rd of December 2010, we then will not re-open until the 4th of January 2011. So please please be patient if you do need to get in contact with us.
Our warehouse is not closing and will continue to send out orders made during the Christmas holidays. However please not that the warehouse will be working at a reduced capacity, so it may take longer for any orders to be dispatched.
All of us here at Mantic wish you a very Merry Christmas.