RESTful admin with different namespaces

Has anybody run into this need?? Excluding the goary details, I would
like functionality similar to the blog example found here:

http://www.akitaonrails.com/2007/12/12/rolling-with-rails-2-0-the-first-full-tutorial

Let's say:

/admin/posts provides admin functions for: /posts

I would like:

/admin/posts or /admin/ns/posts to provide admin functions for: /ns/
posts

where "ns" is some arbitrary namespace.

Any ideas??

Thanks

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