Well i mean you could use the instructions on going back to a previous version of 2.1, then follow the instructions on going from 2.1 to rooted 2.2 using the RUU; or you can play the waiting game until a root method for stock 2.2 comes out. hopefully it won't take long. from what I've read unrevoked said that 2.2 didn't patch their exploit, so they should be able to root 2.2 soon