Here's a few more:

http://www.planit3d.com/source/xmas2006/xmas2006.html
http://damageinc3d.net/ (snow cage, requires registration)
http://neonuttersofneopia.com/  Not Poser, but cute little graphics

My visual indexes of Poser content are at http://www.sharecg.com/pf/rgagnon