Ok, I played with it a bit (only backup, not restore), some suggestions:
-Make the app easier to use with non-QWERTY keyboards (read the config from Maemo or don't use Q,W,A,Z,M,Y keys. )
-Fix the time from the backup file's name and attribute, this is important if you do multiple backups since the backups are named by the date
-Add an option to verify the backup file's integrity by compairing data with the real FS