They were just in Orlando at “Orlando Calling” concert in November:
Long Train Runn’in-Orlando Calling Festival 11-13-2011
http://www.youtube.com/watch?v=sXeVxVYnLxc
Doobie Brothers - Rock’in Down The Highway-Orlando Calling Festival 11-13-2011
http://www.youtube.com/watch?v=_YJTSc3fLrc&list=UUPJy1dZVc09Dpie5gC7AreA&index=4&feature=plcp
I saw them one in Long Beach, Ca in the early ‘70s. Probably ‘72 or ‘73. So very long ago.