Craftsman 28650-998 Cable Operated Hose Clamp Pliers
I have a set very similar to these and, believe me, they are worth their weight in gold, although they only cost about $40. Gotta be one of the best tools I've bought in recent years.
Read all about 'em:
http://roughage.blogspot.com/2008/04/great-40-hose-clamp-tool-for-modern.html