I'm all about how the internet can empower communities for change, so I hate to call you out on this but: "a community of committed Americans to discuss the solutions..." already exists. It's called Congress.
Why create another group to make bad decisions for us? I used to love Digg.com. But now it seems like its nothing but teenage boys yelling at each other. My view is no longer represented. I feel the same way about my goverment.
I think Congress could learn a lot of lessons and get a lot out of opening up to more efficient means of communication and input (i.e. the Internet). But creating another group isn't the way - and neighther is direct democracy (the Founding Fathers wisely understand that the more people making decisions doesn't make a smarter group, it makes a mob).