This is somewhat related. There is another way to create and automatically update the sitemap and breadcrumb using web.sitemap. It is search engine friendly. Refer to this article: http://www.altafkhatri.com/Technical/How_to_automatically_update_the_breadcrumb_and_sitemap_for_search_engine_using_web_sitemap
Hey,
It is really good article, which I was looking for.
Thanks,
Sandeep