I just wanted to give a shout out to one of the best long running ageplay stories in recent years, which finally recently updated with its 7th chapter.
If you haven't read it, I strongly suggest checking out Keilani's Long Vacation at toddcheese.tripod.com, or just jumping directly to parts one, two, three, four, five, six, & seven. It pushes believability at some points, but is still the closest thing around to some of the old Hal classics right now.
Update: There's actually a second version of the picture here, which has (I think) a better overall body shape.