Sony hit the milestone yesterday. 2.5M more to pass the PSOne 
Up from 96M on 2005/09/30 - source
Sales of the PS2 have really slowed down in Japan (as evidenced in recent MC threads), the early launch of X360 should do really well IMO (although they're probably going to ship less than what they sold for the Xbox launch if the 300k units for Europe is any indication).
(apologise if old)
SourceSony Computer Entertainment, the game unit of Sony Corp, said global shipments of its PlayStation 2 home game machine surpassed 100 million units yesterday.
The product was launched in Japan in March 2000. Global shipments of PlayStation 2 included 40.65 million units to North America, 37.14 million to Europe and 22.22 million to Asia, including Japan, it said.
Up from 96M on 2005/09/30 - source
Sales of the PS2 have really slowed down in Japan (as evidenced in recent MC threads), the early launch of X360 should do really well IMO (although they're probably going to ship less than what they sold for the Xbox launch if the 300k units for Europe is any indication).
(apologise if old)