Yes, it could be a useful resource. However to turn an idea into a useful reality takes a lot or work and time for someone to take ownership over it. There is also the problem of wrong information given out by some that can bring on even bigger problems for some seekers of solutions, so vetting of information should also be part of the solution.
It kind of reminds me of the 'group' project some of us took on a long while back to publish a detailed step by step testing procedure to check out the USB serial connection link between a PC and a users arduino board, called the loop-back test. We must have worked on the wording and steps needed and not needed for over a month and I'm still not sure it is 100% beginner's proof. These kinds of things always take more time and effort then they seem they should. And now that the Arduino product line as gotten so large and diverse it's hard to generalize on solutions unless the person with the problem is very aware of the differences between all the products and what he/she may be working with.
Lefty