I still do Ripple in songcircles, and I have heard performed in folk gatherings:
Friend of the Devil
Sugar Magnolia
Uncle John's Band
Riding that Train (is this the one called 'Dire Wolf'?)

Do you count things like "Somebody Robbed the Glendale Train" by New Riders of the Purple Sage? I've heard that one around quite a bit.

Rev, a friend with much better time sense than me tells me that most of us slaughter the Dead's wonderful complex rhythms. Perhaps that's the problem why more aren't popular.
Blessings,
Barbara