This is somthing I have been working for the past few months.
I have Poser Pro running on MS Server 2003 x64 on Quad dual cores Opterons 2.4, 8 cpus, and 8 gigs memory and a Dual dual core Xeon 3.2 system with 6 gigs memory. I can render about 5000 frames a week on each system. I have tryed to work with SmithMicro on building a render service for Poser peolpe  who have long animations  and dont want to tie up there own system, but I get stonewalled. Smithmicro will proabley be the death of Poser they will milk it to death and then dump it as it takes a drop in sales. thats there MO, and only my opinion.
To get the best advantage from Posers FFR you should have a 64bit OS and at lest Dual dual core system with 6 gigs memory. I have Carrara as well and to import in pz3 files and then render them in Carrara is not as good dosent like Poser lights or cameras. You could build you scene in Carrara using Poser content and then you can do network node rendering.
I think a Rendering Services for Poser users would put Poser in a new level.