David & Liam -- thank you for your comments and good words, it's appreciated!
The idea of QRpedia codes has been suggested to us just a couple of days ago by a Wikimedian who will be co-organising the exhibition in Bytom (in the south of Poland) in January and I unfortunately forgot about it, thanks for reminding me :)
As the photos have already reached Warsaw, I can't add any stickers to them myself, but I'll try to sort it out with the library, if possible. And I particularly like the idea about the 'interviews' with the authors, it sounds really cool! :-)
As for the images of the exhibition, for now we only have http://commons.wikimedia.org/wiki/Category:Picture_of_the_Year_exhibition_-_Pozna%C5%84_2011 released under a free licence (there's more unfree photos taken by various media photographers, links available off-list); hopefully, there will be more coming to the Commons as there are of course some Wikimedians from Warsaw going to visit the exhibition.
Regards,