Honestly, thus far it's been a relative breeze. I expected the need to work out "bugs" as the idea is new. My hope is that after we address the bulk of the issues that actual consumers have raised about the OSMF, it'll be relatively trivial for other projects to pick up in the future.

Note: A few Open Source projects have already added the OSMF. I've not yet followed up to see how it is going for them.