This information was posted on BackpackingLight.com by CEO Ryan Jordan:.
The photo above shows the actual clothes he was wearing.
Ken's last update from the trail, sent from his iPhone, can be seen at FriendFeed at friendfeed.com/kenknight/8b801dd9/iphone-at-hike-day-5 on April 26th, day 5 of his hike. I was having trouble getting the video to load this morning, but give it a try.
You can watch for updates on this story on the the forums at BackpackingLight.com.