The Japanese ROM has maps and a Japanese to English dictionary. With OZ/GPE on my C1000 I have a video player, mp3 player, abiword, and all the PIM stuff and I haven't filled my 128MB of onboard flash. In fact, I have 60MB free. I was messing around with firefox and I still had free space even when it was installed. This leaves my 1GB SD card to hold mp3s and video files (and to give me a swap file). It also leaves my CF slot to be free for wireless at all times.