Didn't see a thread about it yet, but it's up here:

http://www.startrekonline.com/node/2466

I personally think it looks spifferific.
(spiffy and terrific)

The clay model looks pretty impressive.

According to the author the saucer is supposed to be round like the Excelsior:

http://img718.imageshack.us/img718/9994/fullconcept.jpg

I like what they did with the necks, the lines flow better than in the original drawing. I think the pylons and nacelle configuration is a bit too Sovereign, though. I think I'd like to see them moved in and up, like the original drawing. I do like the nacelles themselves, though, they look sleeker than the drawing.

the clay model does look impressive the neck has been shortened (it looked weird in the original), and the nacelles look sleeker
as for the saucer, the J's was circular, while the E's was ovoid... the clay model is more round than the E's, and a little less forward, so that's part of the evolution i'm guessing

I love it!!

The clay model they have looks reallly good.

He seems fine with it though, well other than the nacelles:

http://trekbbs.com/showthread.php?p=5003315#post5003315

Ahhh, this is lookin' pretty sweet. I really wanna see how they're gonna do the saucer sep now, heh.

I wasn't crazy about this design at first. But now, seeing it in three dimensions, it's starting to grow on me.