You can import furniture as dwgs in Rhino. Just go to cben.net and you can find a ton of furniture models. I guess it depends on what you're looking for as well. You can find some Herman Miller furniture online as well, but the files are 3ds. You can just import those as well.

For more 3ds models, check turbosquid.com

here are some NURBS furniture

i wish 3drhinomodels site was still around, that was a great source
w/o Robert Schutz, no longer

http://en.wiki.mcneel.com/default.aspx/McNeel/RobertSchutzCondolenceRegister.html

Rhino can import a wide variety of file types. I've had good luck with .lwo, obj, .3ds--you can check out turbosquid

I've used models from Evermotion with great success as well

Thanks guys! Answers help me alot!

if you were to make your own, or convert from a mesh to a smoother NURBS surface i think T-Splines is what you want


here is the 3d furniture models from cben.net
http://72.22.64.51/cgi-bin/csupload/CSUpload.cgi?database=Furniture%20%203D.db&command=viewupload&id=null