I just spent the last couple of hours upgrading the farm's network to gigabit. The file/proxy server now has a new network card in it and the switch for the farm has been replaced with a gigabit one. Unfortunately the ADSL connection to the outside world is the slowest part (not to mention a tad unreliable). Not too much I can do with it at this point.
This upgrade is more for future use than anything else. Its possible the file server may also become a BOINC storage server, although I am not aware of any projects currently using them. More likely, if the BOINC developers ever get around to writing it, a Superhost.
Here is a link decribing the Superhost idea http://boinc.berkeley.edu/trac/wiki/SuperHost