DXO labs have been accumulating a lot of data for their DXO RAW convertor, lens correction software and just recently decided to release their findings to the public.  The new site is located at http://www.dxomark.com/.  The database now consists of a number of popular cameras and lenses and you may wish to check the site out to compare your favorite brand with others.  Please keep in mind that the database is only reflecting scientific measurements and does not include subjective information such as comfort, layout of controls, reliability, etc.  However, it should provide the “pixel-peepers” lots of new ammunition to argue pros and cons about the various cameras now available!  The site is free!