Never Enough Shoes from Sephora by OPI is a solid black with a bit of red, green, and gold glitter. I was hoping it would look a little different from standard black so I was disappointed to see that the glitter didn't show up very well.
I compared Never Enough Shoes (on the right) to my favorite solid black, Black Onyx (middle). On the left is Baby It's Coal Outside, which I wore yesterday. At first I thought the polishes might be comparable but Coal Outside is more of a charcoal color with dense silver microglitter whereas Never Enough Shoes is a darker black and the glitter is less apparent. Not sure I'd wear it again since the color isn't very unique--I'd prefer Coal Outside when looking for an alternative to black.
Edit (2/12/11): I did end up wearing Never Enough Shoes again for a Valentine's Day look and posted more pics here.