Hope you don't mind if I post some information on how to buy this game so we can get more "friends" in here. I don't own it yet, but here's how I plan on buying it:
1. Find a Best Buy store in your area.
2. Locate this gift card on your store's game aisles:

3. Check the packaging and in that blue corner on the front you should see an advertisement for a $5 off coupon for games and accessories that cost more than $19.99.
4. Find a copy of Tetris DS (should be priced 29.99).
5. Go to the counter, and say you'd like to put 20 dollars on the gift card.
6. After making that transaction, use the gift card, the coupon, and additional money to get Tetris for 24.99 + tax.
It's the best local deal I know of so far.