Sorry for going OT and speaking about Poser features again, but here is something I'd really really like to see for Poser: http://forum.daz3d.com/viewtopic.php?t=144452
It's an interface between DAZ Studio and LuxRender, with material translation (meaning you don't have to start from zero on all materials in your scene). Don't know how well the material translation works, but it is certainly better than starting from scratch.

Now direct external renderer support would be for me a reason to shell out money for an app (LuxRender is free, BTW).