Ask Readers: A community on lifehack.org?

I am looking for a handy way for everyone to share and discuss topics related to lifehacks, productivity and GTD. Does anyone have comments or suggestions on solutions for forming a community? Currently my thoughts are using one of those tools:I am looking for a handy way for everyone to share and discuss topics related to lifehacks, productivity and GTD. Does anyone have comments or suggestions on solutions for forming a community? Currently my thoughts are using one of those tools:

• Web forums: A traditional way. Able readers to ask questions and discuss about topics.
• A community blog: Able readers to be a publisher in the form of blogging – to share their views and ask questions.
• Mailing list, or Google Groups: Similar to web forums, but more towards in email style.

I want to see if it is the right time on doing something like this – It would be great to hear if you are interested on participating in this, and if you like to help out – for instance taking on a moderator role.