If you are using the Sprint Mogul then HTC have just released an update for it which gives you EV-DO REV A support on the device.  This makes the Mogul the first EV-DO REV A device in the US!

As well as this important capability there are also a number of other enhancements:

• Adds advanced GPS functionality including the software for Sprint Navigation.
• Adds a Task Manager to the Today screen for easier access and management of Running Programs.
• Improves Bluetooth performance including usage with Phone As Modem and wireless stereo headsets.
• Corrects an issue where Windows Live Messenger content may be erased when the device power cycles

You can get the download and more information from HERE