More details have emerged on Sony's new PlayStation Portable. The PSP will have twin processors (one for media, the other 3D graphics), 8MB of RAM, and play special 1.8 gigabyte "Universal Media Discs." The PSP will also support playback of MPEG4 video files, and Sony says they'll be able to fit up to two hours of video on a UMD. But probably the most exciting about the PSP is that it'll have built-in WiFi for head-to-head competition with other PSP owners. Still haven't seen a photo of this yet.