Official firmware for HTC Hero – 2.73.405.5 is available for download guys! Check the HTC-Europe site for it.
The update brings with it some bug fixes to speed up the system. You can download the new firmware from the official site or from deposit files.
But there isn’t any information about the official Global update. It is expected that its releaseis scheduled for September 30 2009, though some guys @ xda-developers could modify it for you specific country.