A new leaked ATI Vista catalyst driver.
A new "8.7" driver .. found by the pctreiber website. We'll call it Catalyst 8.7 beta for now. The driver contains the 8.520 version display driver where Catalyst 8.6 official has build version 8.501, the driver is dated June 25th and features support for almost every Radeon-branded card since the days of the 9500 plus the recently-released Radeon HD 4800 cards.
Product page: here