I'm a visual learner and love watching sewing videos. It's my favorite way to learn new techniques and review others.

Although it's neither an organization nor an event, PatterReview.com is a great sewing community, which features members' reviews of patterns, machines, websites, etc.; contests; interactive online classes; several in-person events every year; and a newly-published book of PR tipes and techniques that's definitely a community project, from its content to choosing where the royalties will go (the fight against breast cancer).