That said, I do believe namespaces *could* be useful in some very specific, narrow and hierarchical contexts...One obvious example is when you want to apply security settings on sections of the wiki. [...]
An other context (not really narrow in my opinion ;-) is when using Wikis for (technical) documentation. Documentation requires structure and structure requires - in my eyes - hierarchy. You can achieve that with strict naming conventions (e.g. SoftwareLinuxPackage1, software_linux_package1) or - much easier and nicer - with namespaces (software:linux:package1).
Cheers frank -- DokuWiki mailing list - more info at http://wiki.splitbrain.org/wiki:mailinglist