Nerd, I'd like to see improvements to both the Cloth Room and hair room, namely a styling brush and actual hair strands that lets you curl and braid it. Also, some volume lighting and smoke or fog. I know you have a fog tool and I do have it, but it be nice to have Poser beable to implement it maybe with particles or some kind of atmosphere setting.

Poser already has atmospheric lighting..........you just have to turn it on.  This light set not only has some great lights, but includes a wonderful, easily understood tutorial on how to use volumetric lighting.  http://www.renderosity.com/mod/bcs/fiat-lux/58487/