Root and overclock already possible for Samsung Galaxy Note
Developer Gabriel Peters, aka Da_G, posted everything needed to flash the device. Currently this technique is said to only work on the AT&T version, but Da_G posted and said he would take a look at the Canadian source code to see if it will work on those as well.
Shortly after his root, in a separate post, Da_G has posted all the information required to overclock the Samsung Galaxy Note LTE as well. The stock speed on this Android-powered behemoth is 1566MHz. Using Da_G’s technique, it is possible to obtain up to 1.94 GHz, although he states that the max speed he was able to benchmark stable was 1.83 GHz.
So if you're someone who needs to hack your device and crank it to 11 as soon as you get it home, head on over to XDA-Developers for all the goodies. As always, rooting and overclocking do present the possibility of damaging your device, so proceed at your own risk.
source: Android Authority