Tesly (http://www.tesly.com/) is a web-based test plan management app
that makes it easy to document your testing activity and see the
results of your testing activity.
The Tesly Reporter plugin (http://www.agilewebdevelopment.com/plugins/
tesly_reporter) makes it effortless to report the results of your
Rails unit, functional, and integration tests to Tesly. Now your
clients and customers can see at a glance what you are testing and
whether those tests are passing. 
You can read more about it here: Archives · The Business of the Web
2006/08/automated-test-case-reporting/
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Building an e-commerce site with Rails?
http://www.agilewebdevelopment.com/rails-ecommerce