They've also got 2 for 25 on some Majesco games, including Nanostray.
This is really one of the better DS sales we've seen since launch.
Metroid Pinball is one of the B2G1 games, but it's $35 at Toys R Us whereas Bestbuy.com has it for $19.99, so use best judgement when picking which games to get (personally I got Trozei, Peach, and Trace Memory)