Interesting.

I've tried twitter twice.... and I've quit twitter twice.  I still don't get it -- or want it.

I finally got on facebook, but, like you mentioned, it's reserved for people I know -- real world family and friends or bloggers I have regular exchanges with.

However, I do have a page for my blog.  I just haven't done anything with it...., yet.

Maybe I'll take another look at it, when I get some time not doing something else.