I am a member of patternreview.com, which is more for general/fashion sewing, but they have sub-groups within the main forum that are for quilters, embroiders, home dec sewing, you name it, if it has to do with sewing, it's there. It has been around for years and is quite well managed. And thanks for asking, I've learned about some new groups I might have to check out if I ever have the time!