I locked it because all I see is conversation even after reading all the comments. If you want to discuss this topic further, which is perfectly fine, then please take them to the chat. Comments should be used for clarification of addition of minor information to questions. They should not be for extended discussion.
Your edit also does not make your question better for this site. Asking for varying opinions on what is useful (which you haven't defined) is the type of question that should not be asked on this site and will result in closure.
VERY IMPORTANT EDIT: I hereby explicitely ask for more than a mere pointer to the data. I would very much welcome additional comments and personal impressions and opinions about the data too. Specially comments that would render the answer useful to casual readers and appropiate to this site purpose.
Personally, your question would be better on Open Data. The question can be migrated, but it still needs a lot of cleanup. You are asking a lot of different questions, and I suggest that you make it more focused and specific.
If you want the question reopened (and migrated), please clean the question up first, and notify one of the moderators. We can unlock the question and clean up the comments. Take some time to think about it more thoroughly and construct a concise and clear question.