I saw on HTC website that they are pushing firmware update over the air (FOTA). This should be something new as HTC usually gets the user to download the firmware update from a computer.
However, to do that, please ensure that you have a good WiFi or a stable GPRS/3G network. I am sure it is going to run into many megabytes.
The new software number after update is 1.31.707.3. If you have done that, do let us know if it is better than using computers to update or not.