4
Xoops is great for an intranet. You can serve it up on an existing TCPIP network using IIS+Win XP or Apache+Win XP.
One of strengths is it's group management. So, for example you could create a 'sales team' group and allow members of that group access to a different forum than those in the 'accounts dept' group. New forum posts, articles, comments, files for download etc can all be notified to users via private message or email (based on admin settings).
Note that there are currently two XOOPS versions. For the widest choice of modules, I would choose 2.0.13. XOOPS 2.2 is brand new and includes a more advanced private message system, however there are less compatible modules for it at present.
@jegelstaff
Formulize looks like one *serious* data management module! I look forward to trying it out.
A thread is for life. Not just for Christmas.