This doesn't feature on any Santana or Buddy Guy sites , so is a bit of a mystery for the moment.
http://www.washingtoncitypaper.com/blog ... d-edition/
Feb. 18, 2010
(extract)
*Preservation Hall Jazz Band drops a new one! Guests on this installment: Tom Waits, Merle Haggard, Del McCoury, Steve Earle, Andrew Bird, and Pete Seeger. Buddy Guy and Elvis Costello presumably were unavailable due to their appearance on Santana’s forthcoming ¡Colaboración!
Elvis on new Santana album?
Re: Elvis on new Santana album?
Based on the tongue in cheek tone of some of the other entries, methinks the author was just having some fun re: Costello and Santana and their propensity for collaborations.