Nice interface, really like the design. That being said there is no content, this will be very hard to get off the ground. You need to get very creative to kick-start this a make it a valuable alternative to Reddit.

Some ideas: 1. Focus on a niche; Reddit is the king of general AMA's, what's your edge? Why would I use your site? 2. Kick start your content by getting well known people in your niche to host an AMA 3. Forget this idea, use your talent to build something else! :)