I got a chance to play with this white version, it's finish is totally different from the matte finish found on its Cyan and Black versions, it's really really glossy, so glossy it's like you are holding a pure white marble tile in your hand. really beautiful this device is.
Here are a couple of pics:
If the Cyan sold out, I wonder what will happen when the white comes out, it's clearly the best choice between all the other color options.
The White Lumia 900 will be available next Monday April 22nd from At&t.