Earlier today, I tried to get to the vacation center and online booking and kept getting an error.
Then, I noticed an advisory on the login page:
"Please be advised that we will soon be updating our systems to serve you better. During this enhancement, the Member Online Booking application along with several other transactions will be unavailable beginning Thursday, March 22, 2012 at 11:00PM ET until Friday, March 23, 2012 at 4:00AM ET. Please note that these dates and times are subject to change. We apologize in advance for any inconvenience and look forward to assisting you in the near future."
I was briefly able to get in a little while ago, but then I got the error page again... so, I'm not sure if they are totally done with installng there enhancement.