I am not sure how feasible it would be, but I am now reposting the idea as a "feature-request"
Answers to a previous question, Questions "Is there data of X" / "Looking for data of X" led me to suggest that the answers could be summarized and provided as real-time suggestions as a new question is being written.
These suggestions could suggest
- tag, e.g. data-request
- useful information, e.g. units, coverage, resolution
- relevant repositories, e.g. "have you searched"...