The new phone will come with Lifecasting with Ovi, a new service that will allow users to publish status and location updates on Facebook directly from the homescreen of the Nokia N97 mini. Lifecasting with Ovi, along with some other new software features like homescreen widgets and usability improvements like flick scrolling will also come to the N97 via free software update in October.
Specs wise, the N97 mini will justify its name with a smaller 3.2-inch tilting display, as compared to the N97's 3.5-inch one, which allows for more compact dimensions. However, except for that and the refreshed design that features stainless steel cues, other hardware changes have not been mentioned as of now. *Update*: On second thought, it is probably worth mentioning that the Nokia N97 mini's QWERTY keyboard lacks the D-pad of the N97's one.
Nokia N97 mini Specifications