I've been reading any articles I can find about TVZ and his later life, preparation for the movie I suppose, and stumbled upon this heartfelt and revealing interview with his son from Rockzilla, which goes into a good amount of detail. Give it a gander.
Two fine remembrances from the always capable Perfect Sound Forever:
Townes Van Zandt: A Tribute by Steve Cooper (August, '97)
Travels with Townes Van Zandt by Steve Hawley (July 2003)
Also, here are some fairly harrowing live reviews from the early-mid '90s.