I think I'm the only one who mentioned any intent to buy this, so this is probably a waste of time, but in case any of y'all change your minds and pick it up, please post your friend codes in this thread.  Mine is:

309339
340439

I picked it up too, but I'm not ready to post my friend code.  The design aesthetic reminds me of Lumines.

Maybe Intelligent Systems was influenced by it.  I do like how you can choose which background and block type you want to use when playing.  In fact, in terms of overall user options, Nintendo deserves a gold star for how customizable this experience is.

I'm planning on picking up, but I unfortunately don't have Wi-Fi access. Plus, I'm terrible at the game competitively. I much prefer playing the puzzle modes, so I can't wait to try out the "active" puzzles I've been hearing about.

I'm not great competitvely, but at least I can actually win in this a little bit, unlike Tetris DS online where I just got completely slaughtered.

The active puzzles are fun.  You have to very quick on some of them, though.