Cryptome seems to have been the first site that noticed the redactions that actually weren't, issuing a couple of tweets that informed its followers of this fact. This led to Bob Cesca at the Daily Banter turning the NYT's error into an anti-Snowden rant (which I found via F-Secure's blog) that decried everyone involved while "virtuously" refusing to name the entity that had discovered the poorly-done redactions (but including the uncredited tweets in full for easy searching).