sure, using a 16f677

Have progressed a little by sending at 9600,not inverted SEROUT2 portb.6,84,[255,85,3,2,0,1,250]
Catch is, can only do it after the leaving it plugged into the Sony Ipod docking station and then intercepting the RX cable and sending my own commands.

Using my own cabled wired as:

13 rx
21 via 500K to ground
29&30 gnd

Get no activity, in fact using a Iphone4 it displays a warning on the phone notifying of a incompatible Iphone accessory.
So little stumped at this point.