In an article for LBP's merchandising plans, it was let slip that there was a PSP 4000 model. The PSP currently has four models including the PSP Go, which currently hasn't been holding up too well in the retail market. Now this is either a slip that there's a new PSP model on the way (which could be a PSP GO with a disc drive for UMDs), or a typo. I found the image, but of course images can be faked. I'm not holding my breath, but I also wouldn't be surprised to see a press release for a new PSP model in the near future.