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Be aware that dynamic sites like Plone, Mambo, etc can demand a LOT from your back-end (web servers, MySQL or whatever database) if the site gets serious traffic.

Can you put this in numbers so we can evaluate a prospective Server (and using those technologies at all)?

Just my 2c. Don't forget that the aim should be to provide a site thats both functional and EASY to use. I've briefly looked at Plone, and my first impressions were that while it seems to be extremely comprehensive and have loads of features, you could spend days learning how to configure it and it took a while to work out how a user should add content to it. Admittedly I didn't spend that long on it, and it might be possible to configure things to make it easier. One of the main advantages that I can see in a Wiki is that it's relatively familiar to people, and in some respects is "self maintaining", in that it doesn't require dedicated admins to look after it. Simon This e-mail message (including its attachments) is private, is intended for the recipient named in it and may contain material which is confidential and privileged. No-one other than the named recipient may read, copy, rely on, redirect, save or alter the message or any part of it or any attachment to it in any way. VMS does not accept legal responsibility for the contents of this message. Any views or opinions presented are solely those of the author and do not represent those of VMS unless otherwise specifically stated. While reasonable effort has been made to ensure this message is free of viruses, opening and using this message is at the risk of the recipient.