There is a kernel of truth in those rumors.  The Resource Sharing group is being set up on a peer level with the ILS functionality effort...both under the Open Library Foundation.  (Or, put another way, it isn't a FOLIO SIG, which is why you didn't find it under the SIG heading on wiki.folio.org.)  The primary driver for this kind of organization is to encourage participation in the Resource Sharing effort without having people think that adopting the FOLIO ILS functionality is a requirement.  The Resource Sharing group is the fourth open source software development effort to be chartered under the Open Library Foundation:

 * FOLIO

 * GOkb

 * VUfind

 * Resource Sharing (sometimes known as "Project Prometheus")

The Resource Sharing group has been using the summer months to figure out how to organize itself and set up its governance, so there hasn't been an open call for participation (yet).  Heidi Nance, Director of Resource Sharing Initiatives for the Ivy Plus Libraries, is one of the leaders, and I'm copying her on this message.  Sebastian Hammer of Index Data -- also one of the leaders -- is copied as well.