Sony planning PlayStation Portable upgrades?

We're can't confirm exactly Sony is working on here, but supposedly some sort of software upgrade for the PlayStation Portable has leaked out that'll let you use the portable game console for web browsing, music downloads,
and, uh, word processing. Unless Sony is serious about coming out with that
keyboard attachment spotted at E3, there's no way in hell we're writing anything on a PSP except our initials when we get a high score—and maybe not even then. No clue when or if Sony might officially introduce this, or whether these new features will come pre-loaded on the US version of the PSP that's due out in March or so (and obviously, install this at your own risk).