Edit: Also, Pierre Hannha; he did the Mirror's Edge concept art and also made sure that its nigh-impossible to trace anything back to him. Also has a website with absolutely nothing on it. : P
Ben Procter is one of my favs, mainly due to his concept work and 3d visualizations for Transformers. He also did stuff for Matrix, Superman Returns, Avatar, Charlie and the Chocolate Factory,
Replies
Doug Chiang
Syd Mead
^^ Should need no introduction.
Dusso - http://dusso.com/
Sparth - http://www.sparth.com/gallery/index.php
Robh Ruppel - http://www.robhruppel.com/
Ben Mauro - http://www.artofben.com/
Andree Wallin - http://andreewallin.com/portfolio
Tuomas Korpi:
http://www.tuomaskorpi.com/site/
Alex Drummond:
http://www.alexdrummo.com/
Thierry Doizon:
http://www.barontieri.com/
http://fuckyeahconceptart.tumblr.com/tagged/Thierry_Doizon
http://mcqueconcept.blogspot.com/2011/09/blast-preview.html
http://www.tophgorham.com/index.html
Eliott Lilly
http://eliottlillyart.com/
Nick Carver
http://nickcarver.blogspot.com/
http://pringleart.com/
(totally biased)
Kekai Kotaki
http://www.kekaiart.com/
Igor Kieryluk
http://www.igorkieryluk.com/
http://www.goodbrush.com/
and our own aforementioned Nick Carver.
Edit: Also, Pierre Hannha; he did the Mirror's Edge concept art and also made sure that its nigh-impossible to trace anything back to him. Also has a website with absolutely nothing on it. : P
Tom Scholes: http://crayonboxofdoom.blogspot.com/
Daniel Chavez: http://dc-concept.blogspot.com/
Allen Williams: http://ijustdraw.blogspot.com/
Kekai Kotaki: http://kekai.blogspot.com/
Keith Thompsopn: http://www.keiththompsonart.com/index.html
Marciej Kuciara: http://maciejkuciara.com/gallery.html
Popov: http://popov-sm.blogspot.com/
Ming Fan: http://blog.sina.com.cn/fanming2008
Bruno Gentile: http://hydropix.blogspot.com/
and predictably... Feng Zhu: http://fengzhudesign.blogspot.com/
Peeps I know:
Jon Mcoy - http://jonmccoy.blogspot.com/
Dan Evans - http://myartshame.blogspot.com/
Aidan Wilson - http://pixelherding.blogspot.com/
Peeps I like:
Ian McQue (as mentioned above)
Goro Fujita - http://www.area-56.de/
Leri Greer - http://pushbak.org/
A lot of cool stuff here too: http://fuckyeahconceptart.tumblr.com/
http://justinsweet.com/GALLERY/index.html
David Levy and all the others at steambot studios
Sparth
Daniel Dociu
Scott Robertson
Feerik @ http://www.feerik-art.com/
Calum Watts @ http://calumalexanderwatt.blogspot.com/
Older work:
http://www.benprocter.com/storage/oldersites/sitev2/html/PROJCAT_Film.html
http://scribblepadstudios.com/gallery/
also yeah, Feng is awesome!
and Sid Mead
http://www.dermotpower.com/starwars2/1/1.html
Any of concept artists for Warhammer Online. I love that art.
Also http://daarken.com/
http://www.thomlab.com/index.html
Also a fan of Aaron Foster
http://www.razorb-art.com/2denvironments.html
Michael Dashow
http://www.michaeldashow.com/visdev.html
Marcin Jakubowski
http://www.balloontree.com/index.html
And many others, including a lot of the greats you guys have already linked.
Paul Bonner
Matt Gaser
http://www.mattgaser.com/home
James Hawkins
http://hawkprey.blogspot.com/
Guys I have worked with:
Andre Kirk
http://bunsenbrown.blogspot.com/
Carlos Sanchez
http://malditocarlito.blogspot.com/
carlo arellano
http://chainsawart.blogspot.com/
darren quanch
http://dqsketches.blogspot.com/
Izzy Medrano
http://mercilessdesign.blogspot.com/
Cecil Kim
http://www.cecilkim.com/
Nice one Boyd, I have been looking for James Hawkins site for ages.......awesomeness
Avery Coleman- http://averycolemanart.blogspot.com/
Rayph Beisner- http://rayph.cghub.com/images/
Ted Beargeon- http://itchynick.cghub.com/images/
Justin Albers- http://www.justinalbers.com/
Dan Beaulieu- http://stuffidrood.blogspot.com/ (even though he's not officially a concept aritst- his work is rad)
Brian 'Mac' Smith- http://thebraintoad.blogspot.com/