The North American Club Nintendo rewards shop has updated with a new item! You're no longer limited to the choice between one DS game you can't afford and a variety of card cases -- now Nintendo has a card case you can't afford.
For 700 hard-earned Coins, you can get a Club Nintendo-exclusive silver DS card case, designed to hold 6 game cards (it would take 23 DS game purchases to acquire 700 Coins). The case comes with an aluminum stylus, which is at least a little awesome.
By the way, if you haven't signed in for a while, check it out -- we had a bunch of new Post-Play Surveys waiting for us, in some cases for games we bought years ago.