Fiber in Philly is fairly straight forward. The four major buildings are all pretty well connected. Outlying data centers are a little more difficult to get fiber to, but that's expected. What specifically where you looking for information on?
Looking for info on any issues with fiber capacity or fiber construction delays in the downtown area of either Philadelphia or Boston? Any insights?
It really depends on the scope of work in Metro Boston but generally speaking you're best served by using a 3rd parties existing fiber. Building in Boston can be a challenge because there is no straight line from A to B and you have to work with many municipalities along the way.