The new 520 uses a SandForce SF-2281VB1-SDC controller.
A total of 18 reviews were published within one hour after the Intel 520 release. If past history is any indicator, readers may expect between 20 and 30 reviews within in thext 48 hours.
I have already posted links to all 18 reviews to the ssd database:http://www.johnnylucky.org/data-storage/ssd-database.html
Just scroll down to the Intel section and follow the links to the reviews. I'll add additional reviews as they are published.