Rails - Jan 2006 - Subdomains - redirect to different actions?

Hey, 
   I''m trying to figure out what the most elegant way to do this -
I''ve only got a small
amount of different  subdomains corresponding to categories -
 and I''ve been using fragment caching.  

In particular, I was wondering what the best way to call these actions is - 
I''m thinking redirect and render_component aren''t really very
nice

I''ve also had to resort to my own naming of the fragments - 
because the default fragment naming  includes the full host name 
with the various subdomains.


def all
        unless read_fragment "post/all"
        @posts = Post.find(:all,:order=>"earliest DESC")
        end
end
.....
def index
        case @request.subdomains.first
          when "geek"
                render_component :action=>"geek"  #redirect_to
:action=>"geek"
          when "politics"
                render_component :action=>"politics"
          else
                render_component :action=>"all"
         end
end


Thanks,
Ben