A "folder traffic" kind of program to email me every day.

I always get asked by my famliy what new music / movies I have, and tell them to look on the network or check the boxee "new additions" (which is done very poorly).  They add stuff too and I'd like a program to email me, (or them)  about the new additions either daily or weekly.  I plan to forward the emails to my drop.io and friends could check it out as well.   I'd like to have this controlled my Vista PC but have 2 macs on my network as well.  This question seems like a slam dunk but something I know little about and my research turned up so much I don't know where to start.