http://www.expressocorp.com/ Menlo Park, CA June 2007
Upload and share Excel spreadsheets!
eXpresso is the best way to share Excel spreadsheets with people. eXpresso enables multiple contacts to work on the same spreadsheet at the same time, saving all changes to a common version in real-time.
This service has been integrated with Salesforce.com’s applications.
Web 2.0: Who, What, Why, How 