Finally, the wait for the Android 2.1 update for HTC Hero owners is over, but only for Asian customers for the time being. Asian owners are the first to get the update and it will be available worldwide sooner than later.
HTC Hero was stuck at the old Android 1.5 version and an update was greatly needed. There had been speculations that the Android 2.1 update will be available in early Q2, but it arrived finally at 4th June. It is believed that this Android 2.1 update will be the last that Hero will get ‘officially’.
HTC has not given any change logs for improvements via this update. This update is only for upgrading the Android version. The 2.73.751.13 version in the HTC Hero is updated to 3.31.751.1. The update can also be downloaded on the phone directly.
(Source) Site in Taiwanese