Slashdot, if you don't mind a heavy dose of Internet Meme along with your Interesting Discussion.
There are also sites which focus more on specific topics... if you're into server-side Java stuff, there's http://theserverside.com, if you're into programming language research, there's http://lambda-the-ultimate.org, etc., etc.
And a lot of the more niche subreddits are actually pretty good. Stay away from /r/funny, /r/politics and the other "big" ones and check out /r/machinelearning, /r/compsci, /r/systems, /r/math, or /r/compscipapers, etc.
There are also sites which focus more on specific topics... if you're into server-side Java stuff, there's http://theserverside.com, if you're into programming language research, there's http://lambda-the-ultimate.org, etc., etc.
And a lot of the more niche subreddits are actually pretty good. Stay away from /r/funny, /r/politics and the other "big" ones and check out /r/machinelearning, /r/compsci, /r/systems, /r/math, or /r/compscipapers, etc.