When I first saw the race title, and the fact this was going to be a nature race, I had horrible images of the wildren from 3e, the celestial dwarf-badgers.  But after reading it and discovering it was a reconcept of the killoren, I was very happy!  I loved the killorren race from 3e!
Overall, I'm very pleased with the 4e implentation of this race.  I also don't like the name wilden and would prefer killoren.  I don't like the art at all, even giving that it is black-and-white sketch work.  The look described in the article sounds good, but the artwork is too alien.  While I appreciate WotC is trying to push the fantasy envelope a bit, I don't think most players want to play "alien" characters . . . at least not in D&D.  The artwork from 3e's Races of the wild was not perfect, but a step in the right direction.  The poster above who suggested a "green man" look is also pointing in the right direction.  And, of course, comparing this race playtest to the warforged playtest . . . . a more "full" article with feats and other crunchy bits would have been much better.  Crunch-wise, I'm loving it!!!
For those who complain that the killoren, er, wilden, are too far away from the core ideas of D&D fantasy . . . what more traditional fantasy race concepts are left?  I can't think of any right now, but then again, it's late Friday at work and the weather outside of my window looks soooo nice . . . .