Well it looks like the gaming show Qore, which is available through the Playstation Network has broke the news of the PSP-GO, a story that was reported earlier by Neowin.
Not only that, but the new Metal Gear game that everyone is trying to figure out is coming for the PSP, as well as a new Gran Tourismo game for the system (which is exactly what I asked for!). In the episode itself, you also see some gameplay footage of LittleBigPlanet.
The system itself will not replace the PSP-3000, but will be selling side by side on retail shelves. The console has a slide up screen and the main buttons are all hidden underneath. The screen is 3.8 inches, is 44 percent lighter then the PSP-3000, no UMD Drive, has bluetooth, a memory stick micro slot, a built in 16 gigabyte flash drive and will be available in the fall.
If everything keeps getting leaked, what is Sony going to show us now at E3?
edit: thanks for the HD link audioboxer!