I use reddit a lot also. But in terms of mind blowing coolness, http://likebetter.com.

I thought this was the new Reddit. I have come from there.

I think they each have their own place, the culture here is still very startup-centric (for obvious reasons) even though pg tried to change it. The programming reddit is still a better place for hacker/coding links (and comments) IMO, just avoid the other reddits. =)