Based on the statistcs of pbase.com as of Oct 2003, I compiled a list of top 50 camera models based on no. of photos (out of ~2M photos) and no. of owners (out of ~200K pbase users).
Top 50 camera models (by no. of photos)
1. Canon EOS 10D
2. Canon PowerShot G2
3. Nikon D100
4. Olympus C-2100UZ
5. Canon EOS D60
6. FujiFilm FinePix S2 Pro
7. Canon EOS 1D
8. Canon PowerShot S30
9. Canon EOS D30
10. Canon PowerShot G3
11. Nikon Coolpix 995
12. Nikon Coolpix 5700
13. FujiFilm FinePix S602 Zoom
14. Canon PowerShot G1
15. Canon PowerShot S40
16. Olympus C-700UZ
17. Canon PowerShot S230
18. Sony DSC-F707
19. Canon PowerShot S100
20. Nikon Coolpix 990
21. Canon PowerShot S400
22. Nikon Coolpix 5000
23. Canon PowerShot S200
24. Olympus E-100RS
25. Olympus E-10
26. Nikon Coolpix 2500
27. Canon PowerShot A40
28. Canon PowerShot S45
29. Nikon Coolpix 4500
30. Minolta DiMAGE 7i
31. Olympus C-5050Z
32. Canon PowerShot S110
33. FujiFilm FinePix 6900 Zoom
34. Canon PowerShot S330
35. Nikon Coolpix 950
36. Sony DSC-F717
37. Nikon D1x
38. FujiFilm FinePix 2600Z
39. Canon PowerShot S300
40. Minolta DiMAGE 7
41. FujiFilm FinePix 2800Z
42. Canon PowerShot A70
43. Minolta DiMAGE X
44. Nikon Coolpix 775
45. Canon EOS 300D Digital Rebel
46. Canon PowerShot Pro90 IS
47. Olympus D-40Z
48. Olympus C-3040Z
49. Olympus D-460Z
50. Olympus C-2040Z
Top 50 camera models (by no. of owners)
1. Canon PowerShot G2
2. Canon PowerShot S100 Digital
3. Canon PowerShot S230
4. Canon PowerShot A40
5. Canon PowerShot S30
6. Canon PowerShot S45
7. Nikon Coolpix 2500
8. Nikon Coolpix 775
9. Canon PowerShot S40
10. Canon PowerShot G3
11. Canon PowerShot A70
12. FujiFilm FinePix S602 Zoom
13. Canon EOS 10D
14. Nikon Coolpix 995
15. Nikon Coolpix 885
16. Canon PowerShot S400
17. Minolta DiMAGE F100
18. Olympus C-2100UZ
19. FujiFilm FinePix F401
20. Nikon D100
21. Canon PowerShot S200
22. Canon EOS D60
23. Minolta DiMAGE X
24. Nikon Coolpix 5700
25. Canon PowerShot G1
26. FujiFilm FinePix 2600Z
27. FujiFilm FinePix 50i
28. Canon PowerShot A20
29. Canon EOS D30
30. Nikon Coolpix 990
31. Olympus C-700UZ
32. Nikon Coolpix 4500
33. Kodak LS420
34. Nikon Coolpix 5000
35. Nikon Coolpix 4300
36. Nikon Coolpix 950
37. Canon PowerShot S110
38. Canon PowerShot S330
39. FujiFilm FinePix 2800Z
40. FujiFilm FinePix F601Z
41. Canon PowerShot S300
42. FujiFilm FinePix 4700Z
43. Canon PowerShot A200
44. FujiFilm FinePix F402
45. Sony DSC-P8
46. Minolta DiMAGE 7i
47. Olympus D-520Z
48. FujiFilm FinePix 40i
49. FujiFilm FinePix S2 Pro
50. FujiFilm FinePix 30i