Apart from the standard vote for the stuff thats already
on the todo list - eq/DSP functions, Full RDS Features...

1) When using the units buttons to adjust the volume, once
you are in volume mode you can use the down button to switch
between volume,loudness,balance and fader

2) Pre set volume levels such as stationary, motorway, and "Parents
in Car" :-)

3) The option to switch between flat and hierarchial play lists modes

4) Test audio signals for setting things up.

Cheers

Paul (waiting with anticipation for Beta 6)