This ad was published in the Village Voice:
MORE DEAD SHOWS DEPT: DEAD & COMPANY – Grateful Dead’s Mickey Hart, Bill Kreutzmann, Bob Weir plan Halloween at Madison Square Garden with John Mayer, Jeff Chimenti Oteil Burbridge.

The band formerly known as Los Meurtos!

That’s what we know! Please discuss! (~);}

Here’s what JamBase says.
And Jambands.