I made https://commons.wikimedia.org/wiki/File:Powered_by_Wikibase.svg at the weekend and we should consider adding it to wikibase
I note in the file history... When scaled it looks blurry to me
I think this icon, particularly if linked to the wikiba.se site, would be helpful in connecting a Wikibase's contributors and visitors to the larger story of the Wikibase ecosystem.
Could be worth considering if the wikiba.se website gets its refresh before the next release.