It would be neat of Cubis had another function, since after a while some of us wind up buying them because we run out of other stuff to buy :) I just thought it would be neat of we got an iMG bonus the first time we raced a Cubi in the same room as the character the cubi is based on. Like, races the Sno Cone Vendor cubi in A Wintry Place. Maybe the character could react to his doppelganger and give an iMG or mood bonus.
Anyway, just a random idea I thought I would toss out.