I don't think this was posted here already although it's a few days old by now:
From Neogaf ( http://www.neogaf.com/forum/showthread.php?t=386089 )
LTD
Wii 1 Million
DS 3 Million
Wii Sports 290k
WiiFit 240k
Wii Music selling well (Released this December)
New Super Mario Bros 460k
Braintraining 400k
Nintendogs 310k
Englishtraining 240k
Over 16 titles over 100k
Magical Chinese Letters Training (developed by some korean dev) 110k
Source: http://nintendo.co.kr/DS/PressRelease06.php