I can use these tools in Google Apps to send something that I am thinking of using with the kids and have my colleagues comment of it, before I put it to a final copy. This is easy for us to see everyone's comments and get help from each other.
I could use this with my students by having them type a paper and then have them work on editing and revising their own and each other's papers. I can also have them submit something to me, and I can comment on it as well. They always love to hear from their teacher. :)
I think I am excited about using Google Apps for the kids to create documents and presentations to be able to work collaboratively. I also think it would be fun for them to be able to get on the computer at home and do some work on documents using this.