Some persons have been successful in getting Marriott to match mid and top level elite status from one of the other major hotel chains and there have been some here who have mentioned a "fast track" offer from Marriott before. A really good place to start your search for status matching might be Hotel Status Match Master Thread. Next, you might try a search of this, the Marriott, forum with the terms "fast" and "track" and you should also find some good information.

Also, the new Marriott Premier Signature VISA card will add 15 nights per year toward your next elite level. Info on it can be found on marriott's website.

Good luck.