Looking for recommendations for a family site

[Bruce]

I am creating a website for my family. I would like to have a
"directory/adress book" but want to have it pw protected. Also, not sure HOW
I should lay this out. Should anybody be able to update anybodies (one
password for everybody) or have a 2 tier, where as I have a view and then an
admin, or what?

What have you seen/done? What works best


And how do I impliment this? I am not sure how to do a password page....

Thanks

Bruce