I'm a regular on Mac forums and snigger smugly to myself when the noooobs come in and ask easy questions. Well now, I have to eat a little humble pie..
As soon as a C3100 is my hands, the standard sharp ROM (as if by magic) will instantly disappear and be replaced by one of the custom ROMS out there.
After a bit of Matrix style speed learning on the internet, this is what I've worked out so far. Any corrections gratefuly received:
1) Cacko etc are like the sharp ROM.. but done properly.
2) x/qt is a x-windows kernal/GUI that sits on top of the Sharp kernal/GUI. Applications from both can run at the same time.
3) Debian is big, slow and heavy and runs directly without the Sharp ROM. Open office can just about be run on this. But how do you start it? Do you need to boot a different partitian or something?
4) OpenBSD.. this is where I get a bit lost. Is it just like Debian?
5) If the 3100 stores the OS in the upgraded 128Mb FLASH does this mean the MD is used less and increases battery life?
6) Is it possible to completely powerdown the MD? or does that draw the same current as "spin down"?