Laurel D. Austin does some great work. Employed for years at Splash Damage, the team behind Brink, she's recently joined Blizzard, where she's working as a concept artist. Living the dream.
In this gallery you will find: some of her amazing work for Brink (say what you will about the game, its art was awesome) as well as World of Warcraft stuff, specifically images for the trading card game based on the blockbuster MMO.
You can see more of Laurel's work at her personal site.