Finally got around to putting XBMC back on my ATV2 unit. Some of the plugins available are great. i.e. ABC iView etc. Not to mention MythBox and a few others.
Just so I dont forget some things the next time I am going to jot them down.
Configuration files at /private/var/mobile/Library/Preferences/XBMC/userdata, namely sources.xml showing a sample smb(cifs) share.