ok, I don't know who made this (according to the picture itself, it was Nick Kremenek), but I saw this a while ago and found it amusing, so I thought I'd post it here. Enjoy!
http://www.blizzard.com/wow/screenshot.aspx?ImageIndex=9&Set=64
I am sorry if this has already been posted, tried to do a search but found that, unfortunately, the search function was not working.

Caught this page on a search and, even if its 4 years later, I thought I would give you the link to see the artwork again:

http://www.dreamforger.com/galleries/nick/illustration/warcrafttales.htm

And to answer your question, yes - Nick Kremenek is the artist.