Google Docs & Zoho Writer

I think that these programs are long overdue, especially for collaborative projects, both at work and at school. Sometimes meeting up to work on a document isn't feasible, and forwarding a file around via e-mail gets messy. I like that Zoho Writer lets you select who you share your work with, and they can edit it only if you give them permission. I see this working well for both virtual and face-to-face writers groups, not to mention long-distance learning programs.