Here some old pointers to our TDWG - biodiversity - ViBRANT work from 2013:
http://www.gbif.org/resource/80862
https://mbgserv18.mobot.org/ocs/index.php/tdwg/2013/paper/view/545
creating this SMW wiki:
http://terms.tdwg.org/wiki/
(with a SKOS vocab management system)

My own assessment: there are serious limitation in SMW, which can be worked with (e.g. we use an in-wiki xslt script to post-process), but having a more powerful system like wikidata would be most welcome.

However, to my present knowledge, the wikidata/wikibase based system would have to have a custom programmed user interface to make it usable, something the great semantic form extensions in SMW already make possible.

Best

gregor