An unspecified "source" has suggested to GoNintendo's RawMeatCowboy that this tragic omission will be corrected this September, with the release of an all-silver DS. That sounds perfectly plausible to us, especially since its partner in shininess, the Metallic Rose, has been released.
It's nice to have such a low-impact rumor so close to E3. We may get a new color, and that would be nice; if not, that's okay too! It's certainly a lot tamer than all those other rumors we've been dealing with.