There are no proce drops on 7th Jan for C2D.
Intel will launch QX6600 slated between E6700 and QX6700.
The 7th Jan price drop is for older pentium D with the 651, 650, 641, 640, 631 and 630 prices going down along with couple of 5XX series processors.
C2D pricing is set to go down Q2 2007 which is long way away and that too for high end processors.
There is NO CUSTOMS DUTY of processors as of now. So dont expect processor prices falling much any time soon.