I'm booked! Peter, are you in charge of the ""room service"" accomodations?
The site is a bit awkward if you are a Hilton Honors member. It gives you the ability to log in an HH member, but when you do you are transported to the regular site. From there, the 90M group code is not available. Took about three tries before I gave up, registered as a non member. Then on the check out page, the field for your HH # appeared.