I am looking for workig script to export mesh, bones and animation from Blender to HL2. Does anybody have one?
Hmm… Bumping it up, maybe some folks who has that script overlooked this thread 
Milkshape can convert models to .smds, so you can probably find a script to export everything to another format that milkshape can recognize, and then convert to .smd it in milkshape.