Here is a nice photo of his Gibson B45-12 string as it sits at "ready" - stage left - Massey Hall, Nov. 17, 2006.

Notice that this must have been one of two used that evening. Capo is fret 3 - most of his songs are played capo 2 on the 12 str. But for some shows, he brings out a spare (as many of you know) and this lessens his tuning issues by not having to relocate the capo. It can be a nightmare!
[ June 13, 2007, 01:59: Message edited by: B45-12 ]