I've received mail from Marriott as below:

Your Marriott Rewards account has now been upgraded to Gold Elite status, with an expiration date of February, 2010. A Gold Elite membership card has been requested. Please allow four to six weeks for processing and delivery.

Just as a reminder, this is an exception and you will need to stay the qualifying number of nights during 2009 to retain this status for the following year.

However, I cant see the status on the website yet. Will the hotel system be updated with my updated status?