We already know:
http://www.sc2mapster.com/assets/blender-m3-plugin/
Google doesnt make plugins..
Kwah you might wanna move some editor threads to the right section, you know as part of your duties.
I tested Blender and it's such a mess, the menus, the toolbox with shapes that ms3d and 3ds max have, there is no such, the viewpoints you have to add them to the model, by default is showing 1 viewpoint, so for every model you have to set your views, the mesh you create, save your model, open the model and it's gone, I get error when using the import function... Blender sucks, I dont know how you like using that thing and 3ds max is too large for my taste.
They should've made a way to export from milkshape, because this remains my program, meshes and texturing is just so easy to do there. I don't need advanced animations since I don't make models that require walking etc, so it's just fine for me. But I couldnt find a way to convert my models to M3 either from ms3d or MDX. Basically I would convert to another extention and convert to M3 but: they did M3 to OBJ but not OBJ to M3, so pointless to convert to Obj.
Eventually I thought of something nice - I'd still use milkshape to model but I might use blender as a converter. So I would still not have to part with milkshape and would use 2 programs but under 30MB, unlike 3ds max 1.5GB. Though I Would prefer some direct converter or plugin for ms3d.