Sgt_Kickaxe - 2:38 pm on Oct 28, 2011 (gmt 0)
Don't overdo breadcrumbs, I'd suggest not using them unless you have a complicated internal link structure(such as forums with long threads). If you can jump back from an article to a category via category link, e.g. in a sidebar, then you really don't need breadcrumbs.
They add links per page which dilutes pagerank through those links(supposedly) and they reduce the effectiveness of other interlinking efforts, if you have any.