Chanel Mimosa (577) Le Vernis Nail Colour was recently released with the Summer 2011 collection.
It's a beautiful, sunny yellow with very fine yellow gold micro-shimmer. You can actually see the shimmer better in the bottle, but as you spread it out on the nail it becomes less visible unless you're in direct sunlight.
I used 3 coats for the swatch photo, just because there were some uneven spots. I think if you put this on thickly enough you could do it in 2 coats, but I doubt it would last as long.
Chanel Mimosa is limited edition and retails for $25 at fine department stores and Chanel.com.