Tony, can we get a FAQ entry with the serial commands listed? I've come up with a list from empeg.mars.org and a few posts on this board, and here is what I have:

q - Drop to Shell
r - Restarts Player
[ - Switch to empeg channel
] - Switch to radio
= - AUX Input
s - Full Screen On/Off (CD-MD CH button)
+ - Volume +
- - Volume -
x - Volume +
z - Volume -
C - Play
p - Previous Song (Previous Menu Item)
F - Fast forward
B - Rewind
K - Loudness down
L - Loudness up
<space> - play
W - pause
\ - Sleep On/Off
f - Seek?
v - Next Vis
b - Seek?
n - Next Song (Next Menu Item)
1-9 FM Preset
. - FM Down
; - FM UP
` - Radio preset store
O - FM preset

-------------------------------------------
(commands gleaned from posts/documentation)

m - go down a menu level
* - go up a menu level
#xxxx - Play (Replace) FID xxxx
#xxxx+ - Append FID xxxx
#xxxx- - Enqueue FID xxxx
#xxxx! - Insert FID xxxx

Are there any that I have missed? I don't know of one single place where these are all listed and thought the FAQ might be an appropriate place.