1UP - PSP-4000 is called PSP Go!
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Yet more rumour on the upcoming PSP revisions: according to 1UP, it's called PSP Go!, and will come with 8 or 16GB of flash memory.
The site claims it does have a sliding screen.
Apparently it's to launch in in Japan this September with a US debut coming in either late October or early November.
More than 100 games are to support the UMD-less release, including the PSP version of Gran Turismo.
True? We've been watching the mountains for months. It's going to be announced at E3.