Comment: I am looking for something that can act as a 'viewing' layer for the document control system at a client site. TWiki seems like the way to go. I am envisioning several initial views, based on reader role. For example, customer support personnel might view the documentation database in a different 'perspective' than a software developer would.
I have installed TWiki on my laptop and in my personal office. I am in the process of doing a Redhat installation at a client site. There is much excitement about this as it looks like we are finally about to be in possession of a decent collaboration tool.