A great question - never took the time to come up with a list of classes and/or lecures and have books signed by:
Pat Speth of Nickel quilts
Carol Doak
Eleanor Burns
Diane Gaudynski
Mary Ellen Hopkins
Kaye England
Wendy Gilbert
MaryJacobson & Barb Grove of Me & My Sister Designs
Nancy Zieman
Debbie Field/Granola Girl
Klaudeen Hansen
Trudie Hughes
Darlene Zimmerman