There are still many who don't know his twitter or don't even have an account to tweet at him, I encourage you to do so since he actually replies to most tweets and unlike GC he actually says things that make sense.
I found more information regarding Holinka! You can find out more about him on his LinkedIn profile here:
Prior to working for Blizzard he seems to have been working on a game called Transformer: Fall of Cybertron. I've never heard about that game personally. The company only had 200 employees it seems.
And before that he was a Senior Game Designer at THQ. Pretty interesting!
Edited by Hyrmine, 27 March 2013 - 10:02 PM.