I would second the idea of looking into alfresco. I have not used it.
However, what it will do for you is that it will make sure that you can be using a common file system with revision control.
So what would happen is that you would allow your users to network mount the alfresco filesystem across the firm.
Users would read and save files to this filesystem. Anytime, it is saved, versions are created.
Those saying stop working on this and hire people are thinking that you have a large firm. That is not really a great option.
What I would recommend is that you do setup single signon if you can.
The first start is to have an LDAP server. ActiveDirectory does provide that. If you want to provide kerberos/active directory and ldap
there are open source solutions.
Slashdot Mirror
I would second the idea of looking into alfresco. I have not used it.
However, what it will do for you is that it will make sure that you can be using a common file system with revision control. So what would happen is that you would allow your users to network mount the alfresco filesystem across the firm. Users would read and save files to this filesystem. Anytime, it is saved, versions are created.
Alfresco Documents
Also, it does handle signatures with the plugin from http://www.viafirma.org/ (note, that is in spanish but works fine with google translate) http://viafirma.googlecode.com/svn/
Those saying stop working on this and hire people are thinking that you have a large firm. That is not really a great option.
What I would recommend is that you do setup single signon if you can.
The first start is to have an LDAP server.
ActiveDirectory does provide that. If you want to provide kerberos/active directory and ldap there are open source solutions.