Has anyone seen something like Scholarly Want Ads?

Examples

Teaching
Professor at American University in Cairo teaching Educational Game Design for undergrads is seeking another class to collaborate on Twitter during month of November. Possible topics of collaboration include education, games, game design, digital literacy.
(i got this with #TvsZ, but what if I could post a want-ad for it?)

Research
Professor at American University in Cairo seeking international collaborators who speak Arabic (native or fluent) from universities outside Egypt to collaborate on a Digital Humanities for Arabic language teaching website. Collaborators may be librarians, technologists (particularly familiar with Omeka and WordPress) or faculty who teach Arabic language or literature. Consultants who do not speak Arabic but have digital humanities expertise welcome

Learning
Professor with PhD in education wants to learn about educational game design. Hoping to find collaborators to suggest and discuss resources and consider potential classroom action research across different contexts

Other
Campus considering a Reclaim Hosting pilot. Would like to learn about experience of others who have done it.

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The kind of questions I regularly post on Twitter or Facebook or this blog. Where my PLN is big enough to usually have it covered. But:

A. What if someone doesn’t have a big PLN? What can they do?

B. Our PLN is only a subset of all people in the world. There are many outside our PLN who could be helpful for such things.

Does anyone know if there are want-ads like these? Not job ads but scholarly want ads? If not, how would you go about doing them?

Thanks

(note: this is an idea AMICAL is considering and came up during a call between Jeff, Alex and me)