possibility for cross wagn card integration

Obviously this becomes more useful as # of wagns (or decks) increase; but it could be pretty cool on say docs.wikirate.eu, to be able to include cards from wikirate.org; I imagine that other cross wagn possibilities might be interesting in the future. I guess this gets really interesting if one could integrate a set of cards too. The obvious caveat is that permissions should be clear with a feature such as this; to the user running the content (whether it can be included elsewhere) and to the user including the content.