As a suggestion you could setup a virtual Web development desktop, let multiple web authors connect to this desktop using Remote Desktop client from there home computer, map local drives for simple file and picture transfer, use MS Expression to mange the website, Expression can be coded in HTML, ASP, JS and many other technologies. What to use exactly would depend on how many collaboration web authors there are and what functionality you would like to have, blogs, vlogs, picture gallery, video, RSS, forums etc.
You would achieve a central content storage that single or multiple web authors can access and build there part of the web site from, also simple to backup remotely.

In a nutshell the web development tools, library of content should be avaible online to the authors. That means many authors can work on it and also take turns, I guess you will have many people queued up for this well paid job…

Said all that; the most important thing is to choose a solution/technology that suits the main content creators to make it as easy as possible for them to keep the site up & alive, well organised and good looking a distant 2nd and 3rd

That was my 2 cent

Cheers Chris