As a Mini 2.1. (GMA950 graphics) user, I'd say an SSD is a really great option.
My Intel 40gb SSD totally transformed the little brat. Boot times nearly halved, launch times down and hardly a beach ball in sight. Also, Sleep and Wake are virtually instantaneous.
SSDs are expensive and Apple probably doesn't want to dramatically raise prices or cut profits.... So either BTO or maybe some kind of Hybrid?
If anyone is going to find an elegant solution, it'll be Apple.
It'll be great, whatever it is,
Keri