Here's a rundown of what you get as a member. I think if you are a supplier (material or pattern designer), this would be a good group to belong to. Mostly to get into their directory. If you belong to a club or decide to start a club, I'm guessing they have the resource material to make it easier. Plus you get listed in their directory, which will make it easier to find members.
I bet they have a really nice directory of suppliers, pattern designers, organizations, guilds and soforth. I wouldn't mind taking a peek at that. I'm sure there's a lot of value there.
You get a quarterly newsletter (sometimes with patterns, but that's not their intention). It might have some good articles, especially the business side of the scrolling. But it looks like its focused on SAW members, events, and local chapters. You can request a copy of SAWdust newsletter for $5 (which is returned when you become a member).
Their picnics are suppose to be really cool. I've always wanted to attend one. They look like a lot of fun. SAW members receive a discount to SAW related events, including picnics. They also sponsor contests and offer scholarships to high-school students.
I'm not sure what kind of communication or community it has outside of local chapters, though. At one time they had forums, but shut down due to low participation.
I can't say much about the group since I never belonged to it. It looks to me as if it's really designed to support clubs and professionals. It would be great to find someone willing to tell the rest of us what its all about. Shoot, I'd be willing to check the place out and report back if they extend me a free membership! (nudge nudge, wink wink)