At the mention of black polish...does anyone have any suggestions at all about how to NOT make a mess!!!??  See, i use a clear coat first, and my hand's gotten steady enough so i dont make yucky smudges on the sides.  But when it comes to taking the stuff off, i end up with black in the creases and chipped bits that i cannot get out.  Even when i dont go right to the edeges this happens.  Looks horrible - not the best image for work either =p
Anyway...black nailpolish you can get from cheapo shops...im sure you must have a Go-Lo or something around the place.  Black Toenails i wouldnt suggest though =p
edit: yes you can...K-mart has them, i know that for a fact
What colour is your formal dress?