rspec users - Oct 2007 - RSpec''d plugin in a non-RSpec rails app?

I have a plugin that uses RSpec, and it''s being used by a Rails app
that
does not otherwise use RSpec (and does not want to).

I can install the RSpec gem, but of course there is no RSpec-on-Rails 
gem.  And I wouldn''t really want to include the whole rspec-on-rails 
plugin inside my plugin, even if such a thing would work.  Yet it would 
be nice if the app''s continuous integration server could run specs 
against all its plugins.

Any thoughts?

Jay Levitt