One of the sites I've been visiting every day - often more than once daily - is The Moderate Voice. Bill Gandelman's entries on Bill Frist's "Justice Sunday" speech were excellent AND intelligent - he gave good opinions and backed them up, and that's typical of what you'll find. He's got wide-ranging stories on his site, so you'll usually find some stories you haven't heard of. And he's a nice guy as well.
Take a look at his site - it's a good one.