Yeah, talk of a snap poll has been milling around since Brown came to office. Although he's ahead in polls at the moment, an election would be a tight thing. Although the public see Brown as the start of a new era now, an election campaign would see tories drag up all the Blair mistakes, which Brown was a central part of. Cameron is Conservative leader on the grounds of his public appearance, and an election is what he needs at the moment, his only way to get in the public eye at the moment is to announce new policies, which open him up for criticism, An election would guarantee 6 weeks of easy media.
Brown needs a blitz on the opening of Parliament, then call an election for January. He cant guarantee a win on name alone at the moment, but a quick run of success would give him what he needs. If he leaves it too long then any old Tony problems could come and bite him