Quote:
There are an order of magnitude more servers running Apache than there are MP3 players.


Actually, this is no longer true. According to NPD[1,2], iPOD currently has 92.1% market share, with "Creative Technology and Digital Networks North America's Rio [...] a distant second and third, with 3.7 percent and 3.2 percent of the market, respectively." That places 13.5 hard-drive based players.

Netcraft[3] claims Apache has 68.4% of the web server market, with 38.9m Internet installations, placing the total web servers at 56.9m or 4 times. There will probably be around 60-70m of each with in the next 5 years or so.

--
Michael
[1] http://news.com.com/Study+MP3+player+market+to+explode/2100-1041_3-5376070.html?tag=nl
[2] http://news.com.com/Its+all+about+the+iPod/2100-1041_3-5406519.html
[3] http://news.netcraft.com/archives/2005/01/01/january_2005_web_server_survey.html