The Commonwealth Fund just launched WhyNotTheBest.org, described as "a free resource for health care professionals interested in tracking performance on various measures of health care quality." Basically, you select some hospitals, choose some measures, and view the report. My first report (see the graphic) showed me that my local major hospitals fell somewhat below the national Top 10 bar, but scored rather well overall. My graphic here shows only an abbreviation of the actual report, which is downloadable in Excel or PDF format.
The site includes measures of hospital quality from the Centers for Medicare and Medicaid Services website, Hospital Compare. The data will be updated quarterly. Nearly all U.S. hospitals are included, over 4,500.