The popular Sony PSP will have the potential for a bit of an upgrade soon in the form of a 4GB Hard Drive. The drive connects into the PSP's existing memory slot and supposedly will blend in fluidly. This vastly increases the storage of the PSP over the existing memory sticks and provides plenty of room for game data and movies. If that wasn't cool enough, the drive is also coming bundled with a replacement battery that will last twice as long as the existing battery. The so-called X2 isn't cheap, with the package coming in at a hefty $249, but over the holidays prices may drop and become palatable. For now these addons are only being released in the U.S., though a European release date will likely come soon.