http://www.terrain360.com/trails-2/
You can virtually hike part of the AT now, (a la Google Earth Street View), via Terrain 360. People are out there "mapping" and uploading....Hawk Mtn, Pass Mtn, Blood Mtn, HF, Pine Grove, etc. Takes a while to load & play, but it works.
Now, before the wailing of souls and gnashing of teeth begins, let me just say that I think it's pretty cool to see parts of the AT that I haven't had a chance to visit. Being under contract with Uncle Sugar prevents me from taking 6 months off to do so. I'd rather see this than a bunch of drones buzzing all around (which is already happening).
I'm sure this will be at least slightly controversial.