MySQL on the internet. Spreadsheet with cells that load from and write back to said database.
Use Open Office, MySQL and cost is near zero outside of the server/internet connection costs.
I have a small business with 100+ individuals. Each individual has to keep a spreadsheet with basic information. Is there an online solution where everyone can keep an updated xls. online so that I can access it when I need to. I wouldnt need anymore than 1 gb. But all i've seen so far is workgroups for $11,000/year. for 500 gb. there's got to be a better solution.