Jeepman,
I originally learned it a few years ago from a Stefan Grossman video, which is the second one down on the (linked) page. Good video and accurate tab. The arrangement on this video would be considered somewhere between a beginner (but assumes you already have the alternating thumb concept down) to an junior intermediate level of finger-picking, and he breaks it down very well in a clear, easy-to-understand manner. It's not a difficult song (IMHO) except for a somewhat tricky little lick played over an E chord. There are a couple of cool licks in this particular arrangement which can be inserted into other songs anytime you feel like it.