console output during flasher image installation logged to a file

Robert et al,

Idea I had today: Any interest in having the flasher image duplicate stdout/stderr and tee it to a log file on the uSD card? That way people without serial debug cables would have a log showing what happened during the installation?

Something along the lines of:
http://stackoverflow.com/questions/3173131/redirect-copy-of-stdout-to-log-file-from-within-bash-script-itself
http://unix.stackexchange.com/questions/67652/copy-stdout-and-stderr-to-a-log-file-and-leave-them-on-the-console-within-the-sc

If so, I’d be willing to look into it and provide a patch.

Stéphane