Hmm...
You have few choices.
1. Take the machine into a Apple Store and get charged for having the CD disc removed.
2. Play around with the machine, shake it, stick things into the slot etc and pray!
or
3. Take the top of yourself. There are guides online for users to upgrade the parts that apple suggest you don't.
(e.g.
http://www.ifixit.com/Guide/)
Now.. if your careful with a precision screw driver and torx, you could remove all the screws and sort your machine out. But damaging the screws or anything inside will ultimately void your warranty and possibly kill your machine.
Personally I'd take option 2 first... then find out how much it might cost.. and at a last resort, DIY.
Keep us posted.