The Marriott screwed up our accomodations also, but gave us nothing. You're the third person now I know who got a suite when they complained. We got nothing.
We registered pretty much the first couple weeks they opened up con rooms many months ago for 2 double beds and they gave us 1 king sized bed....for the 4-5 of us who were to be staying in our room. Our roomates had to go out and buy an airmattress to use once they got to Georgia, since the Marriott wouldn't even give us a cot.