The Nintendo Wii sold 436,000 units in January compared to the XBOX 360's 294,000 and PS3's 244,000 according to preliminary NPD data.
The NPD data was released by Microsoft and has not yet been officially confirmed however a Microsoft representative had to say the following about the figures:
"Xbox 360 had a fantastic January, and we feel great about our position in the marketplace."
Still, Microsoft must be hoping the Wii hype will die down soon. As for Sony - well... with PS3 preorders still available in the UK things are looking a little bleak at the moment.