We just received a press release concerning upcoming Tetris Party. It's set to grace WiiWare this fall, meaning that North American gamers will be able to pick up the title this year and not later, as we were fully expecting. Other than that, the press release doesn't offer us much else to go on.
Oh, wait, yes it does! The game will include "modes that utilize the unique point-and-shoot capabilities of the Wii Remote." But, the fun doesn't stop there. The game will also support "the recently released Wii Balance Board." Yes, you just read that correctly. The rumor is true. How it will be utilized is anyone's guess at this point, however.
Also, an official site has launched for the game, but it isn't too full of content right now.
Prices don't tend to vary too much on those. I'd lurk around some of the usual suspects -- ebgames.com gamestop.com amazon.com circuitcity.com bestbuy.com and watch for one or more to drop their prices a bit.