Has been released.
It is basically a composite index of about a dozen subjective corruption ratings given out by various development organizations and more political NGOs (e.g. Freedom House).
Although it generally reflects reality, as in it correlates well with other, more objective measures of corruption, there are two major caveats:
(1) It is not necessarily accurate for any one particular country. You would be better off looking at things like Transparency International’s own Global Corruption Barometer surveys of everyday bribery, the World Bank’s enterprise surveys, and expert assessments (preferably blind) of national legislation such as the Global Integrity Index, the Open Budget Index, and the Revenue Watch Index. (I tried to combine some of them here).
(2) The people actually doing the ratings are employed by outfits such as the World Bank and democracy promotion NGOs. This means their perspectives are going to be ideologically loaded in predictable directions.
For instance, it’s pretty likely that despite the Maidan’s promises, Ukraine is still considerably more corrupt than Russia. Although Ukraine and Russia score an equally bad 29/100 according to the CPI, there are differences in their component scores [XLSX]. The World Economic Forum Executive Opinion Survey, which queries businesspeople who are more concerned with profits than politics, gives Russia 38/100 to Ukraine’s 27/100. The “political” NGOs, however, rate Ukraine higher; Freedom House gives it 33/100 to Russia’s 25/100.