Ok....I have done more research on the Essential Quilting DVD Collection contributers. If you go to www.quiltmaker.com/100blocks-vol01.html you will find all of the demonstraters on the DVD listed there, except for Heather Thomas. I found her at www.wildheatherdesigns.com.
It appears these people who teach each technique on the DVD are free lance writers for quilting magazines. I have emailed Heather Thomas and given her this blog so she can set us all straight and try to help out the validity of the collection. I hope this helps.