Guys, the color thing is SO over. Yes, I see Indigo going the way of Strawberry, Key Lime and Bondi this time around.
It's stale and tired and time to move on.
And for those of you thinking Apple is going to release colored TiBooks and so forth...get a grip.
The pro stuff NEVER had color and they're sure as hell not going to slap them on, 1-2 years after the whole "colored computer" trend peaked.

White, graphite, silver, clear...that's a VERY nice way to go: professional, sleek, modern and understated.
I'm sure the new iMac will be white, if indeed it is meant to be the desktop version of the iBook. The iStuff always had the similiar look (colors and curves), so it would make sense that a new iMac is probably a more squared-off glossy white than any wild-ass colors.