Steven Stohr, one of our users, has brought a pretty cool hack to our attention. You can use Gmail as a 2GB remote storage for your PSP using the Gmail shell extension and the PSP web browser. This is done by

1. Download and install the Gmail shell drive on your computer
2. Use it to upload your music and picture files to your Gmail account
3. Go to your browser on your PSP and navigate to your Gmail account
4. Download files (be sure to rename to ###.mp3 or ###. bmp)