According to tweets by iH8Sn0w, the white iPhone 4 being released tomorrow is susceptible to the limera1n jailbreak. Great news. 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.