A couple of months ago, I was in San Antonio and spied an entire display of LA Splash "Nail Art Glitter" at $3.50 a cube (note, it's selling for $6.99 on their website!). There are many different ways to get this on the nail - their website says to either dip the tip of your nail into the glitter for a french tip, or brush on the glitter to your whole nail for a full nail. Either way, it's a bit messy.
I purchased Onyx, a dark silver microglitter, sea-foam green, mid-blue and iridescent purple and Viola, a medium purple microglitter, light lilac and lavender with a bit of blue.
I used a base coat of CND Blackjack and first dipped my nail in Viola, then brushed Onyx on part of the nail. I topped it with 2 coats of Seche Vite for the smoothness factor. As you can tell, it's quite blingy.
Definitely something fun to play with, but not a practical every day thing for me - it took too much time to play with the glitter and loose glitter just goes EVERYWHERE. It wasn't fun to remove either, even using the soaking method (I don't like to use foil - waste of foil).