Check out Zoho Writer. It's a pretty sophisticated word processing program in which you save your document online. It would be useful if I was working on something at school, and wanted to continue working at home, and I did not want to mess with a flash drive. Hey, wait a minute! I work at three sites and I could put lists and stuff on Zoho and access it from any site.
Students can do this with class assignments, also. No more dealing with school servers.
I could also see using it for a collaborative project: like developing district policy and procedures, brochures, sharing pathfinders, bibliographies, etc.