What's this, then? MCV, a British games industry publication, has run an ad for Little Big Planet game accessories that boasts among its many compelling features compatibility with the PSP-4000. Of course, there is no PSP-4000, but you have to admit -- this is more than a simple typo. When asked what the dilly was, a rep from Accessories 4 Gamers told Negative Gamer that it was merely a simple "mistake." Sure, but the questions still remain: was it a mistake because the PSP-4000 doesn't yet exist? You see, we've definitely heard otherwise. Or was this a mistake because you accidentally spilled the beans on some top secret new handheld gam