"I did this for a reason, because I have an idea that the PSP is going to work beautifully with my X5. I have tons of MP3 players littering my house but the Cowon iAudio X5 is special because it has a USB Host function. That means I can connect the PSP and X5 directly together, and transfer files back and forth. It has been tested and works as expected. While the PSP is always going to have limited storage capacity, the X5 has a 20gb hard drive. And you can get them in 30gb and 60gb models. A 1gb stick in the PSP is enough to hold a full-length DVD that's been properly compressed into MP4. With the X5, you can store several MP4 movies on its hard drive and change out the video that's stored on the PSP, wherever you are, without a PC. Figure 300mb for a 1-hour TV show and twice that for a movie, after being converted to a screen resolution and framerate that works on the PSP." Pretty neat, I wonder how long until there is an either official or third party product specifically marketed for the PSP like this.