While a release date for the Xbox Live Arcade port of the Nintendo DS/PSP underground hit Puzzle Quest is still TBA, Microsoft (accidentally?) revealed the game's price in a recent Xbox Flash email – 1200 Spacebucks (or, $20 US.)
Which is a pretty good deal, I guess. I would have liked to see the game at $10 but this price point puts it more in line with the upcoming PS2 and Wii ports of the game, which ebgames.com currently shows at $20 and $30, respectively. It's a substantial game, but to me $20 still seems a little hefty for "just" a download.