This was unexpected, but this is bad for the xbox 360, in january ps3 outsold it by 200,000 , if this trend continues the ps3 may outsell the 360 by as much as 300,000 in february.
The Install base of the ps3 is growing at a rapid rate, dont be suprised if by the end of the year the ps3 is within 1M of 360's install base.
2008 end of year predictions:
PS3: 22M
360: 25M
wii: 40M