I have been getting into this one lately, just listening so far, haven't tried playing. If you go here: http://www.dead.net/song/stranger-two-souls-communion
They confirm that Pig is the author.
I'll try to pluck out some of the melody this weekend. If I get anywhere, I'll post the results. I'm not as good at identifying the chords by ear, but I'll give it a try and/or have my daughter help me.
Is there any way we can get the title of this set of threads corrected to "The Stranger (Two Souls in Communion)", which based on the link above is the correct title?