Take a look at http://marriott.com/rewards/usepoints/hotelcatpoptier.mi Just select the category you want from the drop down list on the upper right corner of that page.
Also take a look at this file to see the changes made in the categories if interested:
I can't find one posted as a link, just the PDF file. I know what you mean, it can be useful if there is updated information posted.
In terms of the hotel categories, I wanted to post the following link originally as it has more options to select from: