Blender certainly does come up a bit here. The Universal Scene Description format that was suggested earlier in this thread does look promising and does not require "tethered integration". Certainly some people have voiced their criticisms at Poser development, but exporting to a file format that other apps (other than blender) could use seems like an ideal solution (albeit one that might take awhile to implement for both the Poser dev team and the dev team of other apps implementing it).