A new MikuMikuDance model of Hatsune Miku has been released by MMD modeler Yukihane, dubbed the Yukihane Type 13 Miku.
The model itself deviates in some areas from the standard Hatsune Miku design, most notably the exposed upper back and the "Vocaloid" name tag moved further down from her top.
Yukihane Type 13 Miku can be downloaded for free here.
For non-Japanese-reading downloaders, note that the password "simasimasima13" (unquoted) must be entered in the red-highlighted area in the screenshot below to download the model.
Have fun MMDers!