user monitoring tools

[Tomoki Taniguchi]

I have been making a push my company to switch our users to linux.
With the release of Vista and Office 2007, and the prospect of having
to upgrade,
management is finally starting to listen.

We are currently logging our users activites especially relating to
filenames and program access.  We log when a user accesses a file,
renames a file, transfers the file to a removable media, what files
they transfered to what website, what files they attached to an email.

In order to convince my boss to start switching to linux, i need to be
able to log the same information as our current windows solution.
Any suggestions?  Preferable something that is in a repository.

TIA,
Tomoki Taniguchi