We had Charlotte Warr Anderson; We will be having Liz Faminoff; We've had the singing quilter; I took a seminar with Jinny Beyer, if you are interested in hand work.
Is there any particular method you're interested in learning, each person has their own areas of expertise.
http://www.charlottewarrandersen.com/
http://lizfaminoff.com/aboutus.php
http://www.jinnybeyer.com/
http://www.singingquilter.com/