Ask HN: I just bought hackableproblems.com – Help me decide what to do with it

A while ago I saw some websites for people to exchange startup ideas... Maybe ideas they didn't want to do, but wanted to see built. This is cool, but startup ideas are the wrong place to start. I want to know about pressing problems that require hacking solutions. Maybe the solution to these problems wouldn't event be startups--they'd just make the world better. Do folks think its a good idea to have a place for discussions of hackable problems. What would you want to see?