VFR PHL to 5B6

I'm contemplating a flight from the Philly area to Cape Cod. My
biggest concern is the huge Class B area that encompasses Newark and
the New York Airports. I often fly around the Philly Bravo with
little in the way of route disruption. It will, however be a long way
around this airspace.

My question is this: is it unreasonable (or unsafe) to consider flying
over the New York Bravo? That would make my trip much more direct. I
doubt that I would get clearance to fly through. I also doubt that I
would be able to get flight following. I am a little concerned about
flying over the Bravo, especially considering Maule Driver's recent
post about overflying Philly's space. If I do fly over the Bravo,
should I call approach and give them a heads-up about my intentions
(and maybe get flight following that way) or are they too busy to be
concerned with a VFR flyover? Thanks.
Rich Russell