Does anyone know, or head any rumors if the Pre/Pre Plus will have the option to purchase backs like you can for the Pixi?

I bought my wife a Pre and my daughter a Pixi and since we got the artistic Touchstone back in for the Pixi all I've heard from my wife is questions about when the Pre will have them as well.

Soooo... Any ideas? I admit that I would like to have a bit more variety than the standard TS back on my Pre as well. Although I have to say that the Pre is damned sexy with either the glossy black or the matte black.

Thanks in advance.