The PSP Go!, a.k.a. “Worst kept secret of E3″ was detailed during Sony’s press conference this morning and it sounds like a pretty sweet little machine.

The Go! is 50% smaller and 40% lighter than the original PSP and features a new 16 gig internal memory, the possibility to plug in M2 memory card, and no UMD port. To quote Kaz Karai: “The PSP Go! is made for the difital lifestyle”, and also features internal WiFi and Bluetooth

Sony also made sure to mention that the PSP Go! is not replacing the original PSP, and all PSP games will now be distributed both digitally and in retail.

The PSP Go! will launch on October 1 all over the world and is going to cost 249 dollars and euros.