Hi, all! I've been lurking forever but finally decided to register. (Just so you don't think I registered to make trouble or anything)
You can trade your SuperCertificate, and almost any other on another board. I'm not sure if I can post it here, so I won't, but it goes like this...
People will offer 80 - 90% of the certificate value to trade for Paypal or c2it, or DD, or whatever. Example: you have a $25 SuperCertificate. I offer you 80% of the value in Disney Dollars and you accept. Then you email me the SuperCertificate code, and I mail you (that's the only drawback with DD) $20 in Disney Dollars.
It's actually a really good deal - I've done it many times!
On another note, I really like this board, and even though I live in Florida and go to Disney quite often, I still learn new stuff here all the time!!