Given the confusion about all the titles you listed, uh, yeah, those.

The Sync Framework is dallying at v2.1 with a pulled off the shelf v4.0?

SQL Azure DataSync is where users are directed going forward?

Ford SYNC is not a Microsoft MSDN topic, at least not one I've considered. I do see it popping up in search results, but no, not that technology.

Anything 'sync' is best for tagging, I think. Lump them all together, I don't mind.

What is going on with sync anyway?? Cloud-only marketing? That's why I looked for a tag, to figure out what is going on! Spill some beans...