if you want a p2p sharing util for a lan such as a uni network, try
LUSerNet it was developed by me and a few mates at uni last year, and works really well.
It is coded in vb, as that was the language of choice of the main coder, but apart from that slight setback it works a charm, and is really easy to install, setup, and use.
The hardest thing about it tbh is getting everyone to use it, but we chose word of mouth, and had over 2Tb shared within a term and a half