How to root the latest software version: 2.01.605.11
-Boot into AmonRa recovery
-Under developer menu choose "install superuser and su"
-This will install the root exploit as well as the superuser app to manage root privileges [if you factory reset and loose the superuser app, re-download from Market, you are still rooted]
This latest OTA update broke the zerg rush exploit that is commonly used to root, so far the above method is all that is available to root the OTA.
How to root previous software version: 1.02.605.6
You may use the above method to root this software version as well
Other root method requires a Windows machine:
[These instructions have been taken from this thread here from xda
Originally Posted by NilsP