I found that, but it cmd+r (I'm on a Mac) seems to only show you hits in the current file. The thing I'm interested in doing is clicking on a call to foo.bar() and have it bring up Foo.rb, right on the "def bar" method.

Also a lot of the time the thing I'm trying to navigate to is library code that's referenced via require, vs something that's actually in my codebase proper.