P.S.: Click on the camera name to see the product in Amazon.

Ranking	Camera	Market Share
1	Canon EOS Rebel T1i / EOS Kiss X3	15.9
2	Canon Digital Rebel XSi / EOS Kiss X2	13.2
3	Nikon D90	9.1
4	Nikon D5000	6.6
5	Nikon D60	5.4
6	Nikon D40	5.1
7	Panasonic G1	4.2
8	Canon 50D	3.5
9	Olympus E-P1	3.0
10	Panasonic GF1	2.7
11	Pentax K-m	2.5
12	Sony A300	2.2
13	Canon 5DII	2.1
14	Nikon D3000	1.8
15	Sony A350	1.8
16	Pentax K-x	1.8
17	Canon 7D	1.6
18	Canon 1000D	1.6
19	Panasonic GH1	1.6
20	Olympus E-520	1.3

source: bcnranking.jp