Want to run a mediaserver (TwonkyMedia) and samba, and a couple of other bits and bobs (rtorrent for example). I have a Western Digital Mybook Mirror.
Does the OS live in flash on a readonly filesystem? Do I have to build the OS image and flash the device with it, or can I ssh to the default install, load applications, and they remain there through reboots. I suppose the core question is, is the a read-only filesystem?
I skimmed the FAQ and did not see anything about these basics..
I'm sure it will all fall into place when the unit arrives, however in the meantime can someone direct me to some light reading...
Also have some questions. What sort of Indians do I need?

Linux ARM big endian glibc 2.2.5
Linux ARM big endian uclibc 0.9.28
Linux ARM little endian glibc 2.2.5
Linux ARM little endian uclibc 0.9.28