Blender X importer?

Is there a Blender 2.5 or 2.4 X importer? I see there is an official exporter for 2.5. The one in 2.4 is broken (for a long time).
I need to get some X file with bones to something else (that format should also support bones).

So is there an importer somewhere? I see that there are alot of importers in this forum which get lost in old pages.
Or might there be a free non Blender solution?

Search for e.g. Convert from .X or .OBJ to openGL

I fail to see anything helpful in that link.
And obj doesnt support bones, does it?

I’m not asking how to write an importer, but if someone has written one.