From Jason Calacanis' post that I discussed the other day: Quickly answer the following question: who are the number two and three MP3 players in the market?

Apple's competitors in the MP3 player market flatter themselves if they think they are numbers two and three in the market. 
According to Amazon.com sales rankings: 
3. Apple iPod Classic 120Gb black 
6. Apple iPod shuffle 1Gb silver 
7. Apple iPod Classic 120Gb silver 
8. SanDisk Sansa Fuze 4Gb black 
10. Apple iPod nano 8Gb silver 
11. Apple iPod shuffle 1Gb bright blue 
12. SanDisk Sansa Fuze 2Gb black 
13. Apple iPod nano 8Gb Purple 
14. SanDisk Sansa Fuze 8Gb black 
15. Apple iPod nano 16Gb black 
18. SanDisk Sansa Clip 1Gb black 
19. Apple iPod shuffle 1Gb pink 
20. Apple iPod shuffle 1Gb bright green 
21. SanDisk Sansa Fuze 8Gb silver 
22. SanDisk Sansa Clip 4Gb black 
23. Apple iPod nano 16Gb silver 
26. Apple iPod nano 16Gb purple 
27. Apple iPod nano 8Gb yellow 
28. a generic iPod-touch lookalike device with the following specs: "8 GB MP4/MP3 Player with FM Radio, Camera, Voice Recorder, USB Portable, and 2.8-inch Touchscreen" 
29. Coby MP305-4G MP3 Player with 4 GB Flash Memory FM Radio, USB Drive and LCD - Black 
30. Apple iPod nano 16Gb green 
32. SanDisk Sansa Clip 4Gb silver 
33. Apple iPod nano 8Gb orange 
34. Apple iPod shuffle 4Gb black 
35. SanDisk Sansa Clip 2Gb black 
37. Coby 4 GB Flash Video MP3 Player with FM Radio black 
38. Coby 4GB Flash MP3 Player with FM and Color Display black 
40. SanDisk Sansa Clip 8Gb black 
41. Creative Zen X-Fi 32Gb black/silver 
42. SanDisk Sansa Fuze 4Gb red 
43. generic iPod touch lookalike: "Touch Screen 4GB 2.8-Inch TFT MP4/MP3 Movie Music Personal Media Player" 
44. SanDisk Sansa Clip 2Gb blue 
45. Apple iPod nano 4Gb silver (old) 
46. SanDisk Sansa Express 2Gb black 
48. Archos 7 160Gb Internet Media Tablet 
49. Pro Ebiz 4Gb (generic iPod touch lookalike) 
50. Apple iPod touch 8Gb (old model) 
Conclusion: Apple sell more piss-yellow iPod nanos than Microsoft do Zunes. And, of course, only one MP3 player in the top 10 on Amazon isn't made by Apple. 
That said, there isn't just these devices: there are plenty of devices now which have MP3 playing functionality but which aren't standalone MP3 players like the iPod. Many mobile phones and handheld games devices (the PSP etc.). 
Apple's competitors and media pundits put the iPod's success down to good marketing and even a kind of "sheep effect" - that iPod users are sheep who have joined a cult led by a David Koresh-style character. For some reason, they rarely point to the good design or the simple end-to-end sync experience. The latter is why I bought an iPod. No other device has as simple a syncing process - and if you listen to lots of stuff, that's what you end up doing a lot. 
