Sony did not drop the word of a re-vamped PSP at this year's E3, but the company may still have it up their proverbial sleeve. According to a Chinese PSP site, the PSP 3000 will contain a built-in microphone and a smaller PlayStation button in place of the Home button.
...and that's about all we (sort of) know. No release date or other technical information; we don't even know if it's true, so take it as you will. Time, as they say, will tell.
Source: G4 - The Feed - Sony Working On PSP 3000?