The beta firmware limited to the chosen few is already in the wild. A guy from hackint0$h has it and he tried installing it too! He got this error while trying to activate, a lot stricter activation.

The news is so scarce about the restrictions imposed on the beta firmware but after the recent news from iPhone Devs Jailbreaking and Unlocking iPhone 1.2 beta really strengthens our hopes of seeing the iPhone in its full glory way before June ’08; the official launch date for the much coveted firmware. Just imagine …