From my understanding, yes, it won't be possible to import data from Wikipedia infoboxes etc. into a CC0 WikiData. (At least under European Union law, where databases are protected by copyright)
The answer from Denny Vrandečić was: "Wikidata does not plan to extract content out of Wikipedia at all."
The problem, I think is, that Wikipedieans just expect that this is exactly what WikiData is actually meant for - to absorb the data stuff from Wikipedia. And on the other hand: how useful is WikiData, if you tell the Wikipedians, that they are not allowed to move data from Wikipedia into WikiData?
This is the reason why I recommanded from the beginning to adopt for WikiData not the "no-restriction at all" CC0 licence but one fitted to data and respectfuil to Wikipedia's general choice of creating a common good of knowledge by ensuring the need to share the reused information (share-alike clause of CC-BY-SA) : the Open Database Licence (ODbL) from the Open Knowledge Foundation does exactly this and is already being used by ma,ny people,; including official cities or regions for example here in France. http://opendatacommons.org/licenses/odbl/ Unfortunately it looked back then like the decision was being taken without any real debate when it should be at the center of the project's grounds...
Best,
Benjamin Ooghe-Tabanou from Regards Citoyens http://www.RegardsCitoyens.org
Alex
-- http://de.wikipedia.org/wiki/Benutzer:Alexrk2
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