There are two special hotel rate deals knocking about for American Express cardholders which may be of interest.
Via this link, Hilton is offering a 30% discount on its Bed & Breakfast Rate. You can stay up to 31 March 2013, but bookings must be made by 30 September. Hotels cover UK, Middle East, Europe and Africa. (Thanks to Andrew for this)
Via this link, Amex cardholders can book 3 nights for the price of 2 at various members of “The Leading Hotels of the World” consortium, worldwide. Stays must be booked and completed by 31 December.