I use FB to keep in touch with extended family and friends. It's been pretty nice. I've reconnected with several cousins over the past few months. Also to keep in touch (and tabs) on my daughter in college.

I also keep a family blog with an internet address that only my family knows and is not publicly searchable. They get an email every time I post. I was keeping family up to date via emails but they weren't as 'pretty'. The blog is working out really well 'cause I can add photos, links, and give a few more details than I might on FB.

Don't use Twitter.