I have been utilizing Google docs this past year on a project called Early Bird Readers. Each librarian in my school district has editorial rights to an EBR spreadsheet. We update our information when it becomes pertinent. This was at first awkward and we resented having to use a new method, but now I am accustom to it. I do like seeing how the other libraries' numbers change.I would prefer, and would think a wiki page would work better. A wiki devoted to EBR with one page link set up for a spread sheet to update numbers. Numbers, alone, do not tell the whole story. We need a place to hold discussions and to share ideas. (To find out more about Early Bird Readers, click the pic)
In summary, I might use Open Office on my Mac at home, but will probably stick with what I am using at work. Google Docs has proven useful on many occasions, particularly with university groups and clubs.