http://www.nintendoworldreport.com/blogArt.cfm?artid=22594 
I guess it's not an unboxing, because the thing was just in plastic wrap when I opened the envelope it was in today. This reward was a bit of a surprise, because I ordered it on Monday or Tuesday, and I live in freaking Alaska. Less than a week, NoA? Gotta admit, I'm impressed. So what is this DS Card Case that you advertise at the Club Nintendo rewards site? Supposedly, it can hold nine DS games and comes with a veritable rainbow of styluses (styli?). Let's fine out, reader readers, and in the meantime discover whether it's worth your hard-earned 600 coins or not.
At least it's stylish. The cover art is fine, though made of thick cardboard. The case' structure is somewhat like a hardcover book, which is nice. Unfortunately, that aspect bites it in the ass pretty quickly...
There's no locking mechanism anywhere on the case, so you can't actually keep it closed. This honestly sucks. At least give me a button snap or something.
It's about the size of a DS case, though a hair taller. It doesn't look all that great sitting in the same row as the DS cases, either:
When you open the thing up, you notice that the styli and DS game cards are secured by thick grey foam. This actually works really well, although it can be difficult to get the styli out, as the finger "holes" are very small. I had to pop the red stylus out with a pen.
I apologize, by the way, for the fuzziness of some of these images. My camera is old, and doesn't like taking close-ups. At any rate, the case is actually good at what it promises--it securely holds the styli (now, I will never run out) and nine DS game cards. The cards fit in very snuggly, and are easier to remove than the styli, since you can just wedge your fingernail into the "hole" and pop out the card. On a related subject, remember when you first saw a DS game card? Blew my mind, personally. It was so tiny!
So that's the DS Game Card Case, folks. I think it's a better product than the Wii Remote Holder, but not by much. It's certainly not worth twice the price. Of course, the Wii Remote Holder wasn't worth 300 points, either. My only real complaint is that it lacks a closing mechanism. Otherwise, as a travel case, it's perfect. I can take my whole DS library with me instead of one or two games. Verdict? Thumbs....up.