The EVO 3D has already been overclocked, first at 1.7GHz and later 1.8. Now it seems that a dev named klquicksall has created a custom kernel that can allow the EVO 3D to run at a full 2GHz.
This kernel also includes other enhancements such as better WiFi reception, but who cares about that when you can overclock your phone all the way up to 2GHz?
While I myself am a little hesitant to try this out for fear of my EVO 3D exploding in my hands, by all means give it a whirl if you are feeling adventurous. And be sure to let us know if you and your phone survive to tell the tale!
[xda-developers]