Just a simple filter that adds Google “Rich Snippets” compatible microformat to the Simple Press breadcrumbs so Google will add the attention getting “breadcrumb” under your site title in Google search results.

Google explanation here: http://www.google.com/support/webmasters/bin/answer.py?answer=185417

Have I mentioned I like the API?

The file is here for now: http://www.everparent.com/lunaticfred-stuff/microformat-breadcrumbs.zip