I don't think this is too clever at the moment.

I turned my Touch off, whilst it was connected to my local server (or at least the last thing I played on it was some local music).
I hibernated my PC.

My PC needed to be offline for some time, so I decided to play some internet radio.

I turned on the Touch.  This must have sent a Wake-On-LAN magic packet, because my server turned on.

This is not good - there's no way to attempt to use Touch without causing the local server to power on.

On Classic players, it only sends a WOL when attempting to connect/switch to a music source.  It is possible to get to the setup screen (via left-arrow) whilst not connected, to select an alternative source (eg. MySqueezebox.com), without sending a WOL to the local music source.

Now that music library source switching is meant to be transparent on Touch/Radio, I don't think the WOL magic packet should be sent automatically when pressing the power button, because there isn't the same obvious concept of being currently connected to a particular server.  I think that only when attempting to play something (or use a facility) from a music source should it send the WOL packet.  i.e. only after the "Switch to music source" dialog comes up and the user selects to do the switch.