I have been touching base with OHO/LOSH people through the IOP alliance meetings and others. I am taking a bit of a different approach with OKH search, specifically, as the plan stands, we are not going to use a crawler. Instead we will to build this federation of communities (as illustrated above). These communities can self-curate and get a page listing their projects (like this GOSH page).
That does make sense, but I do I think it makes more sense to go the other way: to present GOSH projects on this page and let OHO crawl it if they want to.