I love Facebook! It is so much fun to see photos of quilts that other professionals are making and to hear the latest news in the quilt industry. I keep up to date with friends and family and make new friends. I am very selective in who I "friend" and quickly "unfriend" people who just want to sell me something (that I don't want) and are there for no other purpose. I like finding out about new products that are useful (like Superior Threads!) and I follow a number of business and museum sites.
Facebook is also a good place to announce my latest in-print, blog, or website articles or books and a way to help promote businesses I like. It is a wonderful interface and not one that should cause anxiety or fear if a computer user has all the usual protection devices in place.