One of the people on my friends list is actually in the process of a thru-hike, though he's had to leave the trail for a couple of days for a family wedding. But he started at the end of April/beginning of May and he's gotten to Waynesboro, VA (the southern entrance to Shenandoah NP, near Charlottesville). He's expecting to hit Maine in mid/late August, from what his wife writes in her LJ (also on my friends list). It's been interesting to follow his progress as he makes the journey.