Because I know you’re passionately interested: My mp3 collection, all 7155 tracks of it.
From this you can subtract several incidents of multiple listings of the same track, but add about 200 iTunes files that don’t show up here, which include the most recent albums from U2, Alison Moyet, Petra Haden and Bill Frisell, Garbage, Green Day, Gwen Stefani, Sarah McLachlan, Offspring and kd lang, the singles collection from Travis, some loose tracks from Mandy Moore, the Darkness, John Fogerty, and about thirty tracks of mariachi music (don’t ask). After you suck out the multiple listings and add in the tracks noted above, it comes out to about the same number of tracks as listed here.
I should note that this is by no means a complete accounting of my entire music collection, which totals close to 2,000 CDs, but the thought of feeding all those into the computer fills me with absolute dread. Absolute, I tell you.