made an addon to import and export STL models from OF,
it supports files in both binary and ASCII forms.

get it here: http://code.google.com/p/ruicode/downloads/list

i’ve tested this with meshlab and pleasant3d and it works well, but blender was giving me errors in the normals, which i’m not sure where from the way i’m formatting the files or a problem specific to the model i was creating… other than that its been working fine and if someone comes into problems please let me know.