As someone who has recently gotten super interested in soldering and other DIY matters, I would too love to have a central hub for news and relevant stuff in this subject… :)
The problem is that places like HN perverted the term "Hacker" by making it a synonym of developer/coder, which in previous meanings covered what you call "DIY'ers".
Everybody around here calls himself a hacker, when in the past it was more an achievement than just a job you can choose.
Some fraction of HN users are professionals in the primary fields it covers. By definition DIY'ers are not professionals.
You might want to check out hometalk.com - thousands of DIY ideas and projects, with lots of community interaction.
hackaday.com (not exactly the same because you can't submit links yourself but lively comments threads and forums)
http://reddit.com/r/DIY