I said it on that thread and I'll say it here:
If they create new, Fourth Edition-specific iconics - and they should - then there's only one thing I want from them: ethnic diversity.
First of all, not all the humans should look like they have European ancestry. D&D doesn't take place in a fantastic version of medieval Europe, it takes place in innumerable unique worlds with history and geography of their own. There is no good reason why all the human characters we see in D&D illustrations should look like they come from England, Germany, or Greece. Nor should non-European humans necessarily be exoticised by putting them in clothes reminiscent of the real-world ethnic group - you can have a human wizard who looks "Japanese" wearing the same outfit as any other human wizard, it doesn't have to be a kimono.
Second, there should be more than one ethnic group represented among the non-human races as well. The different kinds of dwarves out there don't have to match up to human ethnic groups: we don't need European dwarves, African dwarves, Asian dwarves, et cetera. However, neither should every dwarf look like a short, stocky European - I'd like to see some diversity.
What's wrong with an elf who has deep brown skin like someone from India? Hell, get away from human genetic patterns, give the brown-skinned elf reddish-blonde hair.
For that matter, Krusk is already a good example of how you can have a non-human PC who doesn't look European. Ember is pretty much the only other one of the Third Edition iconics who represents a non-European ethnic group - and it's a little disappointing that the "exotic" African-looking woman was used for the "exotic" monk class.
Devis and Gimble were both white. Jozan and Eberk were white. Vadania was white. Regdar and Tordek were white. Alhandra was white. Soveliss was white. Lidda was white. Hennet was white. Mialee was white (though if you squint a little, she could also just fit into a Native or Latin American ethnic pattern).
Now, it's a shame I feel that I should mention this, but I am myself of entirely British heritage going back as far as my family can tell me. I'm a pretty obviously white guy. My opinions on this matter are not coloured by the fact that I, myself, belong to an ethnic group other than the one which dominates D&D illustrations.
They're coloured by the fact that I'm aware of the extent to which white people dominate fantasy illustration in general and D&D illustration in particular, and I'd like to see some changes made.