I requested this feature a while back and I just noticed today that it is included in RubyMine 3.0.
I wanted to share my test run results with my team. Now you can export the results in html format. This is exactly what I was looking for. I am really impressed with how the html report has collapsing sections and includes error messages.
Thank you RubyMine team!
See the screen shot below to see how you can find this functionality.