The 'Crystal White' PlayStation Vita is now available as a standalone product. The pretty device has been available before, but only if you were willing to get it with Assassin's Creed 3: Liberation. After that stock ran out, you've been out of luck for a snowy system, until now.
It's on sale at Amazon (via Kotaku) for $199. However, the other usual retailers don't seem to have it in stock yet. It's hard to tell just how widespread availability will be since Sony itself has been so quiet about the color scheme.