I like the moderated format and technically leaning of this site, though to be honest my readings over the last few days indicate the discussions are more like a debate room than a crowd-sourced problem-solving machine.

If you have a specific problem that you want to get solved that you think fits the website, feel free to open a thread in discussion.

But I don't think there's no problem solving. Out of the first site at the moment there are:

1) Request for suggestions: ageing and data-mining (The thread is about chosing how the OP focuses his scientific research which is a practical problem)

2) Breaking the vicious cycle (Solving a community problem, that important for some members)

3)The Centre for Effective Altruism is hiring to fill five roles in research, operations and outreach (Recruitment is a clear practical problem)

4) I just increased my Altruistic Effectiveness and you should too (Shares a practical technique about increasing the size of donations)

5) Shop for Charity: how to earn proven charities 5% of your Amazon spending in commission (Practical technique for increasing money going to charity)

6) Memory Improvement: Mnemonics, Tools, or Books on the Topic? (Sharing of practical techniques)

7) I Want To Believe: Rational Edition (Sharing of practical techniques)

8) Financial Effectiveness Repository (Sharing of practical techniques)

9) How to build the skill and the habit of experimentation? (Sharing of practical techniques)

I don't consider that a bad output.