Also, my favourite was this one: http://twitter.com/elmindreda/statuses/17444964495
"Anyone looking to profile Twitter users can easily identify all programmers today simply by searching for "Knuth"."
And, of course, his first publication was in Mad Magazine.
1. It's a tweet submitted as 'news'.
2. It seems that the 'earth shattering' announcement was boring.
I would say this is a good thing, as there are also many cases where a 'proof' is later shown to have holes, areas where everyone made an assumption and didn't realize it.
A good example of this involves limits; for many years mathematicians proved a number of interesting results using infinitesimal limits. It was many decades before a mathematician (Riemann? Maybe?) noted that you can't assume that all the limits in an equation approach their number at the same rate.
This was a super smart thing to notice, and junked a huge number of 'proofs' that had all relied unobtrusively on this idea. All that to say, good theoreticians spend a lot of time wondering if an idea makes sense to them or not.
Knuth didn't prove that P=NP. He proved that P-NP=42.