I've had "two thousand ten" in my head pretty much all my life. Now, I'm trying to get used to "twenty ten", but I'm also waiting to see what everyone else calls it. Maybe in the end, I'll just have to avoid saying the year.
[Edit] I have CNN on in the background and in the last 2 minutes, they used both.
[Edit] I have CNN on in the background and in the last 2 minutes, they used both.