I'd say it's been superceded by other formats, the names of which escape me. Metacreations sold Poser, Bryce and the rest to concentrate on their version of it, metastream. It was a feature of trueSpace3. I've surfed a few thousand websites and have never come across it in use so I figure it's history. I wouldn't think you'd be able to import it into poser, no. It seemed to me to be a low-res kind of solution and was dismissed in favour of higher resolution solutions for, say, 3D product displays on web sites. I'm not an authority on the subject, but I think that's pretty much the case. Anyone with the up and up on the newer solutions could give you a better idea of those.