nice article -altho I have to strongly disagree about the "Godchaux’s heiress as the lone, legitimate female sex symbol on the jam band circuit " portion.
After going to decades of dead shows (been there, done that, got the hundreds of t-shirts) - Donna can't, and never could - hold a candle to Grace's voice, or  presence. Donna was never a "sex symbol" ala Grace Slick or others. horrible comparison - I know they were trying to tie the music and history together - but just SO incorrect - I had to  comment.
Donna is a sweetheart of a person,  she still sings well, and the singing w/Bobby is cool and nostalgic - but she can't sing and play like Grace Potter does. 
just my 2 pesos.