And Jim, as you will notice on http://radioscanningtw.jidanni.org/index.php?title=%E7%89%B9%E6%AE%8A:Catego... each category represents a frequency, and assuming the radio spectrum from 0 to 1000 MHz has a station every 25 kHz, I would need 1000*1000/25=40000 empty categories, when all along there is nothing really to say about a frequency(category,ns=14), what matters is what organization(article,ns=0) uses it, for this otherwise fitting use of MediaWiki, that you shall here more from me on my puny poster at Wikimania here in Taiwan 8/2007.
As Einstein would have said, "there are many applications that would be perfect for MediaWiki, if only one could not bother users about what should be the contents of otherwise meaningless categories.
Do we put comments on various points of a ruler or tape measure? No. We want to keep it clean."