$600 is just too much. I imagine that within 4-6 months, we'll see a price drop.
I have a 30 GB iPod. I'd love to get a 60. Having color and photo ability is cool, although the screen is still small...as I read in a newspaper article, "it's just like a camera phone, except it can't make phone calls or take pictures."
If it goes down between $400 and $500 I'd probably consider it.