Programmatically Controlling Pioneer Receivers and BluRay Players

I recently got a new Pioneer Elite SC-35 receiver (http://www.pioneerelectronics.com/PUSA/Products/HomeEntertainment/AV-Receivers/EliteReceivers/ci.SC-35.Kuro).  This receiver has an ethernet plug on the rear and is supported by the iPhone/iPOD app called iControlAV. 
While the receiver has a web interface called "Pioneer Web Control System" I wanted a way to control this receiver via script. The web interface has support for

• Powering the receiver on/off
• Changing the Volume including mute
• Changing the Input (Zones 1-3)
• Changing the "Listening Mode"

The iControlAV app for iPhone supports the same plus a few more options.
The iControlAV uses SSDP query to find the receiver. Which runs NU-OS 1.13.  You can Browse to http://<Receiver IP>/BasicDevice.xml to get the info on your device. 
My receiver has port 23 (telnet) open along with 80 and 8102 (referenced in BasicDevice.xml)
Basic process:

• Send command as ASCII on telnet (23) or TCP/8102 (see your BasicDevice.xml)
• Commands that check status or query the device begin with a ?
• Commands that perform a command sometimes have parameters (input number) at begining, some at end
• You can monitor the telnet window to see the "response" for each command sent.  This includes commands sent through IR remote or from the device its self.

Basic Commands (more commands to come in another post):

?P	Is Device powered ON? PWR0 Device is ON PWR1 Device is OFF
PF	Power Device OFF
PO	Power Device ON
?M	Is Zone MAIN muted MUT1 Zone is NOT Muted MUT0 Zone is Muted
MO	Mute MAIN zone
MF	unMute MAIN zone
?V	Get Current Volume level VOLxxx Current volume level, xxx is 000-200 VOL121 -20.0db VOL081 -40.0db
XXXVL	Set Volume Level to XXX (000 - 200)
001VL	Set Volume Level to -80.0db
081VL	Set Volume Level to -40.0db
?RGC	Get inputs on device (i think) RGC111001002 *Unknown*
?RGBxx	Get inputs Name (related to above command), available inputs will change based on model ?RGB01 RGB010CD ?RGB02 RGB020TUNER ?RGB03 RGB030CD-R/TAPE
?F	Get current input (use ?RGB to get name) FN19 Input 19 FN15 Input 15
XXFN	Set current input (XX = Input number) XX Input number 19FN Set to input 19 15FN Set to input 15
?BP	*UNKNOWN* BPR1
?AP	*UNKNOWN* APR1

Example
Turn on device, set input to HDMI1 (19 in my case), and volume to -40db

PO

19FN

081VL

(Update: 7/17/2011)
I was able to find a doc that has all the commands (better than what I was able to determine). 
http://dl.dropbox.com/u/3275573/2010%20USA%20AVR%20RS-232C%20%26%20IP%20Commands%20for%20CI.pdf