Tilmann,
I'm basically wondering if people are currently making use of host site-node map, or if they think it's cool and may later use it. The difference is important: I think host site-node map could use a serious rethinking and cleanup and if we don't have to worry about backwards-compatibility with the existing scheme, that would help a lot.
I agree that it's cool functionality and that we should have it. I just want to make sure that the APIs we have are always consistent without having to make your package explicitly host site-node aware (which is currently what you have to do).
