The root access comes via security researcher Dan Rosenberg.
It appears to be a very simple process, as well. Enable USB debugging on your device, plug it into a computer (Windows only for now), and a run a .bat utility created by Rosenberg and you are done.
There is more info on the exploit, the process and notes here: It's Bugs All the Way Down.
Sony's Tablet S has a 9.4-inch screen, a "magazine" form factor, a Tegra 2 dual core processor, dual cameras and Honeycomb 3.x. If you purchase the Wi-Fi-only version you get Honeycomb 3.1 (with Sony UI overlay) and if you buy the more expensive Wi-Fi/3G version you get 3.2 (with similar UI overlay). The tablet comes with either 16GB or 32GB of internal storage, DLNA compatibility, an IR port (to use as universal remote), an SD card slot, Sony's Crackle and eReader apps and Sony's "QuickView" tech for faster browsing. Finally, the tablet is the first to be Playstation Certified which means it can play PSX games from the PS Store.
Written by: Andre Yoskowitz @ 8 Feb 2012 21:18