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It'd be useful to have a window for a 'ruby script/console' session in addition to the irb window for Rails work.
It should already be there - right click on a Rails project, choose "Rails Console". Perhaps I should add it to the Windows menu like the IRB console. Unlike the IRB console, each Rails console is tied to a particular project which is why it was originally made per-project and added to the projects menu instead of a generic place.
Basic feature is there. Output window enhancements are tracked separately.