Pixel-peeping buffet: Sony A550 color-chart ISO-crops with ten (!) imaging programs
Alpha Numerique took pixel-peeping to a whole-nuther-level as one of the MadTV characters used to say. They have a color chart ISO comparison (800 to 12800) with the Sony Alpha A550 but here is the twist - they have output from ten (10) different imaging programs for each ISO crop, including LR, Aperture, Dx0, Capture Une, DCRaw, Bibble, etc. They explain their testing methodology in this introductory article.