What is the problem you're trying to solve?
To find collaborators who are interested and willing to help. Very often attempts to do so through tracking previous editors, leaving messages on individual talk pages, or even asking for "help" proves ineffective; many are no longer active, leaving individual help requests on talk pages is time consuming, and help requests often elicit "got to help page..." which is often no help.
What is your solution?
Creation of a form or 'spreadsheet' where participants can offer their skills while stating their interests. Example:
Shir-El too - Skills: writer, copy editor, layout. Interests: History, Archaeology, Films, Espionage, improving Wikipedia! Ideally this form would automatically erase entries older than 3 months, so that all offers of assistance would be current.
The creation of a tool that will speed up communications between interested parties in the shortest possible time.
Expand your idea
Would a grant from the Wikimedia Foundation help make your idea happen? You can expand this idea into a grant proposal.
I don't know.