Custom BreadCrumb - SharePoint

http://aspnetcoe.wordpress.com/2006/09/28/moss-2007-wcm-development-part-1/

private void TraverseUp(SiteMapNode currentNode, Stack linkStack)
    {
      if (currentNode != null)
      {
        HyperLink currentLink = new HyperLink();
        currentLink.Text = currentNode.Title;
        currentLink.NavigateUrl = currentNode.Url;
        currentLink.Attributes.Add("alt", currentNode.Description);
        linkStack.Push(currentLink);
        if (currentNode.ParentNode != null)
        {
          TraverseUp(currentNode.ParentNode, linkStack);
        }
      }
    }