I am always on the look out for fiber network maps. From small networks like Veroxity or Syringa Networks to large metro detail like AboveNet or Level3 provide. The reason for the Map Quest :) is that companies come to me looking for fiber access. (If you ARE looking for fiber, drop me a note). There are a lot of fiber assets in the ground that are untouched. Caruso at Zayo has been blogging about the companies that spent Billions to put fiber into the ground, like ASCI, MFS, GTS, Brooks, Teleport, XO and Level3. Unfortunately, it tallies to a couple trillion spent -- and sold for pennies on the dollar. And those were 1990 dollars not the peso-like dollars of 2008.