There have been reports recently of people being rejected for hardware issues if they are running the 3.0 betas. This has been confirmed. Any developer experiencing hardware issues can call a dev-only hotline to potentially fix their phone. If you bought a slot on someone's ADC account and you have some sort of malfunction you are SOL

If you are planning to use the betas or already are, keep in mind that if your power or home buttons are bad you will not be able to downgrade to 2.2.1 to fix your problem. you will have to wait for the final release of 3.0 before you can address your issue.