I'm really afraid I have no helpful information other then you may want to branch outside of Hacker News, and pursue more professionally creative individuals, and see if anyone can help with this..good luck!
I'd recommend trying TheGraphicDesignForum.com or DeviantArt.com forums.
check http://processing.org and http://www.openframeworks.cc/ forums, they both have communities full of digital artists and these are mostly the tools of choice for these artists.
London is actually a great hub for this kind of work with artists such as http://ww.chrisoshea.org/, http://toxi.co.uk/, http://www.memo.tv/category/work/, etc based there. I am sure there are local organisations promoting digital work, contacting these people and posting the above mentioned forums might be a good place to start.