Here are video and MP3 files of the speaking part of her performance:
(The music part can be found here.)

Bonnie Raitt Live In San Francisco – 1 of 2 (Hi-res – 23 MB)
Bonnie Raitt Live In San Francisco – 1 of 2 (Med-res – 29 MB)
Bonnie Raitt Live In San Francisco – 1 of 2 (Lo-res – 11 MB)
Bonnie Raitt Live In San Francisco – 2 of 2 (Hi-res – 13 MB)
Bonnie Raitt Live In San Francisco – 2 of 2 (Med-res – 10 MB)
Bonnie Raitt Live In San Francisco – 2 of 2 (Lo-res – 6 MB)
Audio – Bonnie Raitt Live In San Francisco (MP3 – hi-res – 4 MB)
Audio – Bonnie Raitt Live In San Francisco (MP3 – Lo-res – MB)