Lisa & MsLisaLisa,
Are you guys thinking of running a digg like site? I have a CMS which i built but its not complete and is not so manageable. I've been wondering for last few weeks if should finish it and release it as open source.
Anyhoo, i think i can recommend one. I never used this myself but i have seen many sites based on it. It's called pligg.
www.pligg.com. Check it out.