I'm sorry to hear that, Reid.
However, I can sympathize with you, as I've had the exact same problem... *sigh*
A while ago, my ps2 started acting stupid and wouldn't play any CD-Rs... And, omg... that's more than half my inventory! >_<;
Anyway, after calling Sony, they said that all I needed was to take it to the nearest so and so and they would fix it, given my warranty was still valid. And so, I went ahead and went... only to have them tell me there was nothing wrong with it.
. . .
After nearly having a heart attack, I came home and decided to open it myself - and so I did. Like you, I went on many sites in hopes of finding a method that would help me solve my problem. I tried cleaning it with the special disc or whatever, with a vacuum (

), towels... and eventually opening it up to fix the voltage inside it.
None worked. >_<;
Then, it just so happened that I found an old magazine of GamePro... and in there was a solution that has worked for me to this very day:
Duct tape. Seriously. In the mag. all you had to do was place a strip of clear duct tape by the inner circle of the affected CD. However, after doing that... it didn't work, and so I put four strips of duct tape, so as to make and overlapping square shape of sorts encircling the inner circle... and Voila!
Damned thing has been working since. So, my recommendation to you, and all else: Try the tape before you waste another 200 (or so) bucks on that god forsaken machine.
PS: (I thought I was smart figuring that out... but it seems someone else did so too and put it up online. Guess I wasn't.

Try Gamefaqs, guys. ^__^ )