rainborick - 1:16 am on Jan 16, 2010 (gmt 0)
I was able to get breadcrumbs to show for one of my sites by making explicit breadcrumb links on my pages that were formatted as category -> subcategory -> product type. The SERPs show my breadcrumb link text instead of the URL, which I thought was pretty snazzy. I have hopes that the keyword repetition and link structure involved also helps "theme" this site so that I get better results on broad searches. But since most of my work on this site tended to be simple content and structural improvements through the holidays, it's too soon to tell if its building traffic yet or helping conversions, etc.