Circuit City is doing an online only buy 1 get 50% off with select DS games. Phantom Hourglass, Drawn to Life, and Advance Wars: DOR are all included:
http://www.circuitcity.com/ccd/category.do?catOid=-16485&N=20012841+20016485&c=1
There is also a 50% off "blowout" (lame stuff) for Wii and...