Looks like the only one who hasn't chimed in is Garlic (Garlic08 here). He did it... Malto kicks ass at a youthful 50.
Karl Meltzer is getting there in his late 40's and chasing a 45 day supported hike.
The only thing I might add- Consider picking up Matt Kirk's book http://www.whiteblaze.net/forum/show...Light-amp-Free
A great tip that Malto passed along for speedy hikes... Look at a record breaking hike, in this case Matt's unsupported trip on the AT. The same lessons and pace apply, you just need to scale up. At 58 days you could set a target for yourself to double his daily mileages. (or for exactly 100 days times them by 1.7)
But using his trip as a framework and then scaling up to your goal would let you have an idea of what miles to hit where. With some goals to shoot for you can start doing a few tune-up trips to see if you are in the ballpark. Each section of the trail is different- just trying to do a lineal pace (average) is frustrating and not very helpful overall as you want to keep your effort relative to the trail difficulty- otherwise you just fight for miles and burn out.
Just as importantly, you can see if you enjoy this type of hike.
Some find it very freeing and enjoyable, despite the work. Many just find it to be work and unenjoyable.