Will be shooting some tomorrow (it is Diwali in India), I am curious, why the reccomendation for shooting longer exposures? I have shot hand-held on digital before and they have come out quite well - at about 1/30 or thereabouts (dont remember exactly). Longer exposures would necessitate tripod and little flexibility in movement, wouldn't it?
(Diwali has everyone using fireworks, so little co-ordination, and more need for movement)