Calling it a shredder isn't right; because technically it doesn't shred the CD's  But that's what ThinkGeek calls it  and we agree on the name (only) from the usability point :-)

What it  really does is to scratch the CD's and DVD's that you feed into the shredder enough so that the data becomes un-recoverable. So, you don't get little pieces of 'CD confetti' like the paper shredders, but  CD's like they were scratched by a gazillion cats in a alley fight.

Of course, if you are like us (read paranoid), you can do multiple sets of scratches in reverse of forward. It's available for US $39.99 from ThinkGeek.com