Same here,

Been like this all day, VERY annoying.

Reservation Error

The link to the Hilton Reservation System is currently down.
Please contact our Internet Reservations Hot Line for further assistance with your reservation request.

Our Internet reservations desk is available Monday through Friday, 6:00a.m. - 2:00a.m. central time, and Saturday, Sunday, and Holidays, 7:00a.m. - 9:00p.m. central time, and may be reached by phone at 1-800-774-1500 or by e-mail. Hilton Reservations Worldwide can be reached 24 hours a day by calling 1-800-HILTONS. Or, outside the U.S., please contact Hilton Reservations Worldwide by phone or e-mail