Site to keep track of invitees' addresses

Check out postable.com! It's free to sign up and it seems like a great way to track all the names and addresses of people you're inviting to the wedding. It creates a link for you and you send it to friends and family and ask them to go to the link and fill in their contact info so you don't have to do it!

I just learned of this because a friend of mine is using this for her wedding because they have guests coming from many different states and even a different country, so hopefully this could help out a lot of you ladies too!