As of right now if you go to http://www.apple.com/ipod/ you'll see what could only be a slip-up on Apple's part.  The page only has the following text:

A hint of the upcoming MacBook?

 

 

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I'm sure Apple will be fixing this soon, but does this signal a soon-to-be released MacBook (sans Pro) to replace the iBook line?  As I'm sure Apple will be fixing this problem soon, here's a screenshot (click for larger image):

 

Update:  It looks like the iPod page has been updated and is back to normal.