I wouldn't say that the 360 sales are amazing. Considering the huge price-cuts they are TBH nothing very special at all which is sad as the 360 has probably the best library of both Wii and PS3 combined.
End of '08 predictions (made by theprof00): PS3: 20m, 360: 23.5m, wii: 42m
Now Playin': PS3|Resistance 2, LBP, Uncharted and Fifa 09, PSP| Ratchet and Clank: Size matters, 360| Gears of war 2 and Fallout 3.