Now this is a cool new color for the 4/8GB Zune that appeared on istartedsomething today.  Not yet available, this fifth color, called “Citron” would bring the total choice of colors to five - pink, red, black, green and yellow.  And BTW, did you notice that the center Touch Pad is Black rather than the same color …. I like it!

citron

Long Zheng indicated that "all the appropriate resource files for this color model are already embedded in the Zune software, the most obvious explanation is that Microsoft is holding back this model for the holiday season as a surprise.