Wow,
I've been following this thread for a little while now and first of all would like to say I am amazed at the information people are sharing here.
Dream, your passion for this kind of thing is vastly evident upon these pages, thank you for sharing your knowledge.
On to my situation:
First of all, I burned my dvd board....as in fried it. Not bad, but two pins got baked a bit as you'll see in the pic.
I'd like to send you the board dream, but before that maybe this board has some hope.
Let's take this through what i've done:
After reading up on DVD Firmware hacking for the 360 I soon realized I had the dreaded 93450C2 (yes 2...)
Sooooo
I reviewed many different hack methods, Homemade Probes, Xeceuter chips (i know that's spelled wrong) etc....
I wanted to use a method where I had the materials around so after reading the MRA hack in the JF tutorial I found the BoxxDr Method.
Enter Failure Zone:
Being a novice at PCB board work I did actually practice a bit on an old dvd burner (not from xbox) we had lyin around, but I guess it wasn't enough.
After many failed soldering attempts on my actual Xbox DVD board I decided to take a break and start fresh the next day. Every time I would try to power on the DVD it was not opening and the Xbox was flashing green in the middle. Well after some counseling from a friend on soldering, and watching some soldering videos, I managed to fix the mess I created the following day, but lost pad 101 in the process. I searched up pad 101 repair and found this thread.
The following is what I have done to rectify it:

Damn that pic is blurry i'll borrow the good cam from work tomorrow.
Now this worked to an extent, it would open the DVD player and such, and my computer even detected it in JF (latest version) as PLDS with 9345 firmware.
I tried to get the key but the switch was doing nothing at all in the software. I hit the Intro / Device ID but it would always just continue to scan or send information regardless of power cycling/ flipping the switch.
Well, I decided I would at least get my stock DVD working again so I desoldered the switch and plugged my dvd back in to test it. Well...it lit on fire. The 2 pads all the way on the right side of the same trace that runs over 101, you can almost see them in this pic burned but ill get a better one.
Is this because I did not reconnect Pad 122?
I quickly realized my mistake and shut the damn thing off with a speed i didn't know I possessed.
Then I resoldered the switch back in place to see if my dvd player would at least power back on and open....no luck. Now I am just getting the green blinking light in the middle of the xbox with no way to open the DVD...I truly think I have fried my board here and am SOL on ever extracting the key or even getting it to work again.
So....are there any other suggestions or ideas? I realize the picture sucks and i'll get a much better one tommorow.
Hopefully this doesn't turn out to be a 200 dollar learning experience.