This note was just posted on the Folk-DJ list, an e-mail from Cindy Mangsen -
< The latest word is that John's having open-heart surgery on Thursday.
Serious blockages in several big arteries. It's a good thing they got him in when they did.   

I talked to Robyn Boyd [John's agent], and she says the prognosis is very good. He's probably had some small heart attacks and not realized it.

Apparently one artery is totally blocked, another is 80% blocked ... so when he comes through this, he's probably going to feel a WHOLE lot better than he's feltin years.
   
And (this is the REALLY good news) he just got insurance (for the first time) last year, so he's covered. Whew. We could not have held enough benefits to cover the costs, I'm sure!>>

I'm sure it goes without saying that all of our thoughts and prayers are with John.