When we went on our cruise back in January, the day that we embarked was also my DH's b-day. So to surprise him, I order the Birthday stateroom celebration. I also made a sign for the door for him. He was really surprised, so I was glad. I don't have a picture here at work that I can post of the sign, but I basically used some Mickey paper that I picked up at Office Depot and it read, "It's Mike's Birthday and we're celebrating with Disney." The paper that I used fit well because it looked like something that you would use for a celebration...(confetti, balloons, etc.) I just glued the paper to the magnetic paper and it worked well.
As for the stateroom celebration, I thought it was worth the $30. There was a banner that read "Happy Birthday" that they hung and then a little centerpiece that they set on the table along with his cake, and then they had another little thing that they hung from the ceiling. Plus, one good thing about all this is that it's all there when you arrive, so you don't have to worry about trying to sneak to get it done! I do have some pictures of the decorations, cake and the door sign, so if you still want to see them, just PM me your e-mail.