My friend Drew updated his Perl iTunes library module in this post, adding an example script for providing a bunch of stats. I used his module previously, practicing my Perl skills and getting some basic stats for my facebook profile, but his example sets a good baseline for comparison. Here are my iTunes stats, check out his post to grab yours!
Number of tracks: 14811
Total size: 130492.45 MB Average size: 8.81 MB
Total time: 61d 0h 49m 31s Average time: 5m56s
Ratio of songs/artists: 6.07506152584085
Most popular artists, by number of tracks:
257 Yoko Kanno
207 Aphex Twin
190 Nine Inch Nails
154 Pink Floyd
153 Massive Attack
Most popular artists, by playcount:
672 Dieselboy
462 Ferry Corsten
373 Nikonn
343 Yoko Kanno
335 Deep Forest
Most popular genres, by number of tracks:
1940 Electronic
1894 Rock
1066 Trance
953 Soundtrack
739 Indie Rock
Most popular genres, by playcount:
4488 Electronic
2800 Drum & Bass
2683 Trance
1937 Rock
1573 Ambient