i didn't do the honeymoon registry, but i think it's a great option for some people who don't want/need gifts of "stuff" - like for people that already have an estaiblished home or something.
as for the wedding website - i could take it or leave it. i don't think that many people used the one we set up. we didn't spend a ton of time on it, so it wasn't a big deal, but it wasn't used as much as i thought it would be.