I did the entire JMT solo North to South in August of 07. Did it in 23 days. Two days to were to re-supply and one day lay over at Charlotte Lake. Going to do it again in August of 08, but South to North this time. Would like some company this time. If any one wants some first hand info feel free to email email@example.com
The above thread can be found in the thread "John Muir Trail" under 'finding hiking partners.' I introduced the question on a post about how hard it would be to hammock camp the whole trip and I have recieved such positive answers. the above is one of them. I am so encouraged!