Photozone tested the Sony Alpha 550. The reviewer liked the camera so much that he has taken the camera on his outdoor trip to Australia :)
Read the review: http://www.photozone.de/dslr_reviews/487_sonydslra550?start=7
Read the Sony A550 product page on amazon
P.S.: And once again the latest japanese DSLR charts prooves that the A550 is the best selling Sony camera.