The white iPhone 4 being released tomorrow is susceptible to the limera1n jailbreak, according to tweets by iH8Sn0w.
For future (tomorrow or today) White iPhone 4 users, limera1n is NOT patched and has no difficulty with current jailbreaks.
Also for those wondering, i0n1c's untether will work for the device as well.
i0n1c's exploit is iOS based. Since the iPhone 4 runs the SAME iOS, its fine.
You can find Limera1n Jailbreak from Here
The latest Redsn0w Jailbreak (i0n1c's untether)from Here
