Palm Coast is its own Metropolitan Statistical Area (MSA), but it gets pulled in by the Orlando-Daytona Beach Consolidated Statistical Area (CSA), which includes the counties of Orange, Seminole, Lake, Osceola, Volusia, Flagler, and Sumter.
The Jacksonville MSA consists of Duval, Clay, St. Johns, Nassau, and Baker. It does not include Flagler or Putnam. Jacksonville is not part of a CSA, as there is no other adjacent MSA with which to combine. An argument can certainly be made that Flagler should be part of the Jacksonville MSA, leaving Volusia as the sole component of the Daytona Beach MSA as well as part of the Orlando-Daytona CSA. I'll leave that up to the census people.
The 2006 population estitmate for the MSA was roughly 1,278,000. The 2008 estimate is probably around 1.3 to 1.31 million, which keeps us at #40 nationwide, above Memphis but below Nashville. Within the next 10 years, Jacksonville should pass Milwaukee and Providence on the list, although Raleigh could catch up to us at the rate that area is currently growing. Personally, I'm not sure the RDU area can handle that kind of growth long term.