Congratulations on placing. I can't say for sure whether or not you will get a medal this year, but I got one last year for placing second and I'm pretty sure that someone who finished third last year also said he got a medal. If I remember correctly, there wasn't any difference between the medals. I got a nice little package in the mail with some prizes inside, and that was a lot of fun to check out. If I remember correctly, it had a t-shirt, a button, some stickers, a bottle opener with a SRM chart, a tube of chapstick from an apple-cider dealer, a glass, and a $25 gift certificate to a homebrew store. The funny thing was, I almost threw the gift certificate away without realizing what it was. It was wadded up inside the glass and I just thought it was there to protect the glass. Luckily, I saw some printing on the inside as I was about to toss it in the trash and checked it out.
So if I were you, I would expect to get a medal and a fun little box of prizes to check. With that said, I hope I don't get your hopes up and you wind up disappointed.
One last note, they give back score sheets at the club meeting in September, which I believe is on the second Wednesday of the month, to save on shipping. I'm guessing that other results and packages to those who placed will go out shortly thereafter.