This may be of relevance to devs wanting to port Blizzard games to other platforms.
http://interviews.slashdot.org/article.pl?sid=08/10/15/1639237
Paul Sams indicated in his interview that, with enough interest, Blizzard would be willing to entertain the idea of open sourcing some of their older games. He suggested that if you are interested in this to contact them directly (please be at least semi-coherent and polite)
http://interviews.slashdot.org/article.pl?sid=08/10/15/1639237