i do use it on
www.tampagamers.com right now.. but i am moving away from it. I'm changing my Digg RSS proxy to just be a Digg API Proxy and putting together a vBAdvanced page that displays the latest stories from digg and let users click a "Discuss" button to create a thread in the correct forum. If that story has a thread already it will just take them to that place.
I think the RSS Feed feature has some awesome uses though, such as keeping up with patches for a game or releases of software or something like that.