White one is definitely available now (if you can find it in stock that is). Just ordered mine from the store yesterday, they said 2-5 days 'till it arrives at my house. Cant wait!! btw the white one has a glossy back instead of the more matte finish that the cyan and black have.
Ohhh... I know the ETA was the 22nd of April but I have not seen it on the Web or in stores. I have the black but I WANT the white. I am gonna try to exchange it. I am within my 30 days.... hope I can do that.