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X10 will get 2.1 not 2.2.
This was the last "official" comment from SE.

Now, everyone hopes will be 2.2 and will bring MT (which will never happen knowing SE reputation)

Well, it seems the root is here but there is no way to write the modified files back on the phone :)

Unless somebody can break RSA 1024 encryption :)

Another way to get root will be a kernel...