I\'m slightly insecure about my breadcrumb solution. Names and links are defined in each controller action:
Home
You could also use Ariane http://github.com/simonc/ariane
With it you can generate any kind of breadcrumb, as links in a paragraph or as a ul/li :)
If you want something specific, you can create your own renderer.
It's pretty simple to use, just add this in a before_filter
:
ariane.add 'Home', root_path # in the app controller to have it everywhere
ariane.add 'Some Page', some_path