2009 is over and 2010 has begun, some drastic events happened in the later half of 2009, PS3 saw some shortages too which it didnt saw even on its launch. :) Wii tumbled but with price drop and NSMB its back to its awesome form and XBOX360 manage to stay in fight with some very good bundles, discounts and coupons...
But Now What baseline weekly sales you are expecting from each of the three consoles. As there are many great games coming in Q1 2010 i think Q1 baseline will be a lot higher than 2009..
So i think for
Q1
PS3 -> 230k
X360 -> 180k
Wii -> 350k
Q2
PS3 -> 200k
X360 -> 170k
Wii -> 280k