Is there a website that will easily allow for three people to tally points based on different activities?

Two of my friends and I are having a physical activity challenge and need a way to keep track of our points we earn for different activities (walking, jogging, lifting weights) via the internet so that we can all add and view points day by day. I'm looking for a website that can let us do that and have different categories for different activities. It would be great if we could have something like excel or googledocs spreadsheet (which we may end up using), but we don't all have google accounts. Is there anything out there that sounds like a better fit for this?|||You could create a blog editable by all three of you.