2007(I assumes) Jan Wenner interview excerpts from the rolling stone site



another comment: 
Jan Wenner flew to Amsterdam to conduct this interview, so it's either April 7 or April 9 (he played Thumb's Blues on 4-6 and 4-8). This is according to a Reuter's notice, I may search for the link again.
My guess is he flew into Amsterdam on the 6th, went to Brussels for the show and did the i/v on Bob's day off on the 7th)