I just got a Facebook account about 2 months ago... my younger cousins made fun of me until I joined. Its pretty cool, but I think being the admin of such a large group would be overwhelming- I'll see if you can have multiple admin's - that approve people's requests to join, etc etc. I like it from my family perspective because I am one of ~23 grandkids on my dads side, so it is an easy way to stay in touch with everyone. We actually have a group on there called something like we have more cousins than you do friends. i thought it was pretty funny.
i like my family.