Updated OP.
Also about that^, Team Poison said (in the website they defaced, read first link) they were doing this because LulzSec are "script kiddies", using pre made tools, and claiming to be underground hackers, when in fact they aren't, so they will reveal their identities to show them how it's done.
But as I'm now saying in the OP, looks like it was The Jester who got there first:
http://twitter.com/#!/th3j35t3r
That's right, just one "d"
In b4 "it's addict"
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