Yes, SPB's larger audience is Android, since most of the phones are compatible with the 3d shell, and that is the reason they released it for Android first. There aren't nearly as many Symbian^3 devices. I have an N8 too and I'm dying for a release date.
-SPB statement-
"...according to our internal policy we can't share any information regarding our future releases and plans.
As soon as we have any news regarding SPB Shell 3D for Symbian we'll notify everyone via SPB website, newsletter and all social networks. Follow the updates!"