ditto on Bonnie Hunter's blog. there's so much on it, years of it actually. Only thing I don't like about Bonnie's blog is there is no "search" function (or maybe i missed it--and haven't found it yet). so if you are looking for something in particular, it is impossible to find.
also like MissouriStar Quiltco with jenny doan
and heirloom creations. she does demo on sewing machine feet for quilting as well as demo on rulers.