You could try at archibase.net

It's not in Poser format, but in obj or 3ds, so you could easily use the object in Poser :)

Try CP.  They sold an addon and the full pack to the Zygote Mansion props that were included in P6.  It has a chair similar to what you're looking for.  I can't remember the exact name right now but try searching CP using furniture.

Hmmm, (thinks to self) how would I model that in a Poser-friendly way? (walks off thoughtfully)

Quote - Hmmm, (thinks to self) how would I model that in a Poser-friendly way? (walks off thoughtfully)

If you are talking about modeling, with any modeling software.
If you are talking about making it Poser-friendly, only by making a pz2 that call the obj :)

 No no, what I meant was:

I've been modelling like mad for the past several weeks in preparation for a short film. When I first saw the chair I was thinking NURBS (which I am horrible at); subD was my next choice, which Poser doesn't directly support; then there's the issue of the tessellating into a poly surface and the final mesh density. I rarely use polys unless I'm doing something "box-like", house interiors, etc. Furthermore, I hadn't decided what base object to start from and / or how to massage - say, a box - into that very fluid shape shown above.

Depending on your modeler, you should be able to control the polygon density of what NURBS objects will convert down into polys.  Stuff like the thin metal bars for the legs, that would be something like a NURBS sweep along a spline, with the shape of a circle; in Cinema (my modeler) you can define the circle to have 6 or 8 real points, and the length of the spline that is swept you can define specific maximums for how many points make up the spline.  While this tends to make a lot of polygons, I don't see how it would be all that reasonable to do a chair like that with pure subdivision techniques either.  The seat part of the chair, sure, but not the thin bars making up the legs.  You could do it, but it would be a real pain and would be quite difficult to keep all the tubing of a regular diameter.

You can always go back into the NURBS model once it's converted to polys and modify it, delete unnecessary edge loops or whatever.

 The legs are definitely NURBS surface extruded from a curve path and circle profile. That's the easy part. It's the swoopy part that had me scratching my head. Think I'll try it tonight. 

Still, the necessity of balancing the form and the poly count is a frustrating limitation. I guess my first post was shorthand for the entire thought process.

Thanks, didn't find one at archibase.net, but what a cool site!
Found one by googling "Eames chair 3DS"