Writing together using the internet

I am collaborating with another writer on a novel. Since it is winter and the weather can be terrible, we are using the internet to write scenes together and organize our materials. This method has worked great for us. In the past we'd meet at either my or her house and write once a week. Now using the internet and Google's gmail allows us to store and share materials and write together several times a week on our novel. It's great to be able to write and edit the same document together. No need to deal with the cold, frigid weather. And we are making better progress on our novel than meeting once a week in person. Love this method of collaboration!