take a look at TikiWiki or another content management system
they provide a way to edit the pages from any computer, you would probably have to fiddle around a little to customize it, but that's probably the easiest way.
linkage:
hotscripts.com (search for content management)
freshmeat.net (go to browse and either php or perl depending on your server)
sf.net (browse either the php or perl foundry, there is a section for content management)
--will