Namespaces that are controllers?

I'm checking out the new router in Rails 3, and was looking to create an '/admin' section of a website with several namespaced resources, however I'd like the top level '/admin' to also route to a controller. Here's my current setup:

match 'admin' => 'admin#index', :as => 'admin' namespace :admin do     resources :users     resources :roles end

It seems to work fine, however I get the feeling that there is a better way (perhaps a block on the 'match'). Is that the 'best' way to have '/admin' respond with a page?

Thanks, -Mike