[Zope] Using Links within Zope

Thanks for the help with images. I've just completed a 6 pg. how-to on it, which will be up for public consumption as soon as I get approval from ZDP. My next question is: Linking in Zope - is there anything special (yet basic enough) that can be done besides a "<a href="some.object">click here</a>" type of link? Any DTML-special stuff? Especially useful would be implementing a navigation bar that trails behind each level deep into the heirarchy you go. How to generate the links, etc. and what DTML would need to be used. Ideas? Pour 'em out, I'm willing to write as much as I learn. Thanks in advance, Eron