January 2009 NPD sales data

Hardware

PlayStation 2 41.6K
PlayStation 3 276.9K
PSP 100.1K
Xbox 360 332.8K
Wii 465.8K
Nintendo DS 422.2K

Software

NEW SUPER MARIO BROS. WII WII NINTENDO OF AMERICA Nov-09 656.7K
MASS EFFECT 2* 360 ELECTRONIC ARTS Jan-10 572.1K
WII FIT PLUS W/ BALANCE BOARD* WII NINTENDO OF AMERICA Oct-09 555.7K
CALL OF DUTY: MODERN WARFARE 2* 360 ACTIVISION BLIZZARD Nov-09 326.7K
MARIO KART W/ WHEEL WII NINTENDO OF AMERICA Apr-08 310.9K
WII SPORTS RESORT W/ WII MOTION PLUS* WII NINTENDO OF AMERICA Jul-09 297.6K
CALL OF DUTY: MODERN WARFARE 2* PS3 ACTIVISION BLIZZARD Nov-09 259.0K
ARMY OF TWO: THE 40TH DAY 360 ELECTRONIC ARTS Jan-10 246.5K
JUST DANCE WII UBISOFT Nov-09 191.9K
DARKSIDERS 360 THQ Jan-10 171.2k

Thanks to Thomas N for the news tip!