VFR Advisories Around DC

After reading Don Brown's latest article at AvWeb
(http://avweb.com/news/columns/187318-1.html), I got to thinking about
my new neighborhood.

I'll soon be plying the skies around the Washington DC area VFR. I'm
new to the area and it seems like it's pretty hazy most of the time,
so flight following would be real nice. Can anybody offer advice on
the availability and quality of VFR advisories at Potomac Approach and
Washington Center?

I realize the scene changes with the time of day, day of week,
weather, controller personality, etc. And I also understand that it's
*my* job to see and avoid. Just looking for that extra help hand in
the thick stuff.

-Scott