Within the past three weeks, Digg.com has allowed some of their most loyal users to sign up and try out Digg version 4 . It has been speculated that they will be doing a full roll out of the new site sometime within the next two months.
Senh: No RSS feeds? Really? That's going backwards, not forward. As for punishing power users, whenever you have a system where users vote on the content, there's bound to be abuse. I'm not sure if there's much you could do about it other than to ban the user whenever he/she is caught.