Sorry to keep spamming about this. I've created a thread over at Blender Artists about the importer, with a link to the latest version etc.
http://www.blenderartists.org/forum/showthread.php?297143-Quake-(1996-game)-bsp-import-script
I doubt I will work on it anymore unless more bugs are found, but there is a list of possible improvements in the readme. This includes filtering models by entity type, importing lightmaps and welding vertices on import.
Also, as a side note, the best path I found for getting it into Maya seemed to be via dae if I remember correctly. If you want to do that, there are a bunch of export options, so if dae doesn't work well, just try dxf etc. until something works. I definitely had dm7rmx in maya though.