Last year WGBH produced a retrospective of this era (Club 47, Jack's Bar, etc.) called "Follow Me Down" - Von Schmidt and Jim Rooney hosted; Chris Smither did a lot of stuff, Tom Rush - don't recall whether Geoff Muldaur showed up or not. I see his name here & there playing at smallish venues - used to play the Old Vienna in Westborough before they stopped doing live music; I think the Iron Horse in Northampton is one of the prime places for these folks too. Van Ronk showed up on PP&M's "Lifelines" PBS special a year or two ago, along with Paxton, Ronnie Gilbert, Fred Hellerman,Odetta et al. He didn't look to be in great shape for a lot of touring. The others from that time & place are around, and working - you just have to keep your eye open. If you're in the Boston area, check out WERS (Emerson College) radio (88.9) from 6:00 to 12:00 every weekday runs a "Coffeehouse" show ("folk and acoustic music") and they keep pretty good track of who's playing where.