I'm excited to have found RubyRun! I've just got the gem, but haven't really fiddled with it. I'm gonna have it tested soon. I've heard about NewRelic and other stuffs too, but this one is new. We used to work with just bleakhouse, and I've tried dike. They are both hard to use and takes a lot of analysis to extract good info from it.
RubyRun seems exciting. It has a lot of graphical reports for analyzing its results. :)