I saw Joanna live about 14years ago at the famous Moers Jazz Festival in Germany. At that time she was half the weight and she just signed her endorsement deal with Hughes & Kettner, she played the TriAmp. She also had some more modern kind of a guitar.
What I see in this video is way more organic than what I witnessed 14 years before. I think she plays a Bassmann 59 right now and that Les Paul style guitar sounds great.
Thanks for posting this video, otherwise I would have forgotten about Joanna.