Sony didn't reveal the PSP2 at E3. They didn't reveal it at GamesCom. But that doesn't mean some people haven't seen it.
According to Eurogamer , the PSP2 is indeed on the horizon, and it's "roughly the same size as the PSP-3000 and has touch controls on the reverse of the unit." Evidently, three separate developers have seen and even used this new portable unit, and they say the screen is "rich and detailed" but the primary change centers on game control. That touch-sensitive area behind the screen sounds nifty and designers may think so, too; Sony is already in the process of showing it off to industry insiders. One source says to expect the new PSP iteration to arrive towards the end of 2011 but another isn't entirely convinced of that. For now, we'll just have to guess. Numerous rumors have been circulating concerning the structure and style of the PSP2 but officially, nothing has been confirmed. Sony recently called the PSP Go an "experiment" so maybe some elements of that unit will find its way into the next handheld device.
As for the possibility of a PSP Phone of some sort, that doesn't appear to be happening. But at this time, who really knows?