If you are carrying a BlackBerry Bold 9700, and want to upgrade to OS 6, the first leaked version is available now. WillyBoy6 on CrackBerry forums has posted the steps, download links and then the whole world starts talking about it.
If you end up upgrading to OS6 successfully, the only difference between your 9700 and 9780 will be the camera.
Here is the source, enjoy!