piracy? lol
want to get anal on technicalities? then why do you jailbreak your iphone as you have mentioned in countless threads?
Jailbreaking the iPhone is not piracy. Taking Apple software (even from a beta), modifying it, and re-releasing it is piracy.
I'm pretty sure it would be illegal if the Dev Team decided to redistribute files from a beta iPhone OS (or any iPhone OS for that matter).