Maybe you should think about switching to XML/XSLT. Using XML with a simple DTD instead of HTML documents has the following advantages:

• You're still able to use a document oriented approach instead of a database
• Most maintenance issues can be done centrally with the XSLT stylesheets. Even if you have to do some substitutions in the pages themselves, this will be much easier with XML than with HTML source code.
• Your users could compose their pages easily and absolutely valid with an XML editor like epcEdit or XMLspy.
• The pages could easily be published for different media - HTML print version, PDF, plain text etc.

The disadvantage would probably be that you have to learn some XML/XSLT basics before you start, but you'll be glad to have that knowledge in the future.

^~Django
"Why don't we ever challenge the spherical earth theory?"