An updated hack, still in alpha, allows people to use Flash on an iPhone 4. Dubbed Frash, the software has been recompiled based on a version for the iPad and iPhone 3GS. Installing the code requires iOS 3.2.1 on an iPad, or v4.0.1 on an iPhone 4. Devices must also be jailbroken, which in the case of the iPhone 4 requires visiting JailbreakMe.
