A couple of months back, I wrote up a series of posts on "Zope" Page Templates. There was "Zope Page Template Joys", "More Page Templates (a buttal of sorts?)", and a screenshot of "GoLive Editing in QuickEdit Mode".
As a quick follow-up, I just have to say that with certain exceptions*, I'm never going back to DTML again. With or without a graphic HTML designer, Page Templates are just a much cleaner way to do dynamic pages.
* The exceptions are for when dealing with non-HTML/XML dynamic content. Besides SQL Methods (which have special DTML tags that are actually a delight to use), this includes JavaScript and Style Sheets that need dynamic code. Most of the time this tends to be JavaScript code snippets that need absolute URL's (a common Zope-ism), including navigation bars with heaps of rollovers.