Additional pressure to update Special:Version is going to come when we start using noun project icons -- like the ones that came out of the Iconathon. The license there is CC-BY but they strongly recommend we put statements to that effect in our 'About' pages for each image resource we use.
I'll take a poke this weekend to see how the Special:Version page could be massaged into outputting such information if we provided it.
~Matt Walker Wikimedia Foundation Fundraising Technology Team