I wrote a small library a while ago to use Google spreadsheets like this: https://github.com/Stuk/gooss (although it appears some better, more maintained ones have appeared in the mean time).
This is combined with with Google forms to allow people to submit new data, and the publish to RSS feature, although the content of the RSS feed isn't very pretty.
You can see it working at http://stuartk.com/bundle/ (data from https://docs.google.com/spreadsheet/ccc?key=0Ar35F5WUAjXedDY... )
This is combined with with Google forms to allow people to submit new data, and the publish to RSS feature, although the content of the RSS feed isn't very pretty.