I hate it when Americans say "two thousand ten". That doesn't even make any sense. If you say the number 2,010, you'd say 'and', and the year we are in is simply a number.
It's Two thousand and ten. However, I can see a shift to 'twenty ten' starting now, as we move away from the 'year two thousand' effect and get back to how we used to say years (ie 'nineteen ten' for 1910).
I reckon by 2012 we'll all say 'twenty twelve'.