Redbook just had an article about white nail polish and how to pull it off:
The edgy way to wear this mod trend is with super bright, shiny opaque white such as Sally Hansen's All the White Stuff. It looks likes patent leather. For a softer more wearable approach, try a sheer white with a hint of shimmer, like Creative Nail Design's Cold Shoulder.
to get a flawless application, start with a base coat, followed by a topcoat, and then your polish (you heard that right: white polish is very vulnerable to streaking, so make the white coat your last)