First off, I regret not picking this game up earlier. It rocks. It rocks so hard that my socks literally flew off my feet. I've been playing it almost non-stop; poor souls on the way to work saw me playing my DS and cursing at the CPU as he tried to screw me up with his robot tactics. All the new modes and the Wi-Fi play make this one of my favorite handheld pick ups ever.
I know a lot of you are probably rolling your eyes, thinking this is the same game you've always known, but Ninty has added enough new wrinkles and multiplayer to make this probably one of my faves of the year.
I <3 Tetris.