I'm not sure about the land on the W side of 345 across from Stonewall 2 and north of hole 12 at French Creek. I'm think that it's slated for McMansions, but it's (thankfully) tied up in court due to watershed issues. I do know, however, that the old farm that used to sell quilts (no Sunday Sales, of course!) is now vacant.
The only saving grace is that they're asking SO much for the houses out that way that most folks can't afford them.
Fortunately, Philly hasn't become an Atlanta or Houston with the sprawl and traffic - yet. Maybe we need a Portland-style urban growth boundry line?