If you've ever struggled to keep track of different versions of spreadsheet or word processor files sent over email, Google Docs & Spreadsheets may be right for you. Google Docs & Spreadsheets is a web-based word processing and spreadsheet program that keeps documents current and lets the people you choose update files from their own computers. You can, for example, coordinate your student group's homework assignments, access your family to-do list from work or home, or collaborate with remote colleagues on a new business plan.
The URL is http://docs.google.com/
this should help a LOT of folks out there :)