For Google Sketchup users:

Poseable Hatsune Miku model and static version, respectively

http://sketchup.google.com/3dwarehouse/details?mid=a223027e98d326e118492d7235250722&prevstart=0

and

http://sketchup.google.com/3dwarehouse/details?mid=622fcff753fdc75c5eada82e5091aeae

Hatsune Miku is one of the humanoid characters which were used to popularised the synthesized singing voice programs called Vocaloid.  (see http://www.vocaloid.com/ for reference - sorry, Japanese webpage).

It was difficult for mass market end-users to associate a voice without a character, so a few humanoids were created to make the voice product more appealing - and it was a raging success among Otakus and other fans of anime and digital virtual persons.

For Blender users, there's a Hatsune Miku here:

http://kiomodel3.sblo.jp/article/23486819.html

 

Sadly, Naoki's Poser Shed, which used to have a Poser-useable chibi-Miku (small Miku), is no longer accessible.

Eternal Hobbyist