How to route /app/name to /name?

Hi Wai,

I use this exact route in my app for user homepages:

   map.connect ':id', :controller => 'user', :action => 'user_home'

this will make map to that controller and action
and pass the username joe to it
There might be a better way even as I believe I'm perverting the use
of :id in this case