You can find this offer here.
Similar offer was running last December for members of the Marriott Hotels and I was thinking of participating to earn the free certificate for a beautiful category 5 hotel I found in Tuscany. My plan was to fly out for a weekend away and take advantage of this offer so I can have a free night. The Marriott hotel I found is the Renaissance Tuscany Il Ciocco Resort & Spa. If you have never been to Tuscany, it is a MUST visit place and this hotel look beautiful.
If you have any stays coming up for business or pleasure then you should definitely take advantage of this offer. I like Marriott hotels because in general their rooms are well equipped and much bigger than the average hotel size. Customer service is good and their promotion for the free night well regarded. 🙂
Here you can find a list of all the category 5 hotels that are available to the new members here.