Dyltone, you're the only one -- in all of the 12.1 inch display forum threads -- who's owned both the CCFL and LED-backlighted displays who's actually written something like that. THANK YOU! Because of you, I just ordered one.
I'd like to note that there are some GREAT deals on these displays on ebay if you know how to look. This is the one I bought:
Samsung LTN121AT10 $13.00 with shipping (used by "grade A")
Yes, it's used, but you can find them new for $30 including shipping:
[link removed because forums.pimoroni.com tells me "new users can only put 2 links in post"
5 still available, but if he runs out, search ebay for LTN121AT10 or LTN121AT11-801. There are still some used LTN121AT10 "grade A" panels for under $20 from other sellers.
Both are matte finish, which I prefer. These appear to come from the Google CR-48 and Samsung XE500C Chromebooks, so you could search for screens for those, too.
Data sheets confirm the specs are correct. I'd link the data sheet PDFs here but forums.pimoroni.com is telling me that "new users can only put 2 links in post"
A lot of times ebay sellers aren't saying if the screen is CCFL or LED backlit. In that case, look for the data sheet online by googling "model number + PDF".
I haven't found the controller board yet, but have asked a few ebay sellers if they can program boards for me. Many of the controller board sellers say to do this if you cannot find the exact model you need. Be sure to specify HDMI+AUDIO OUT since we get HDMI from the Pi. Some of the boards are VGA or DVI only. The HDMI ones look to be between $20-$30.