Look, the key to stopping people like Breiviks is not to try to drown out his manifesto - there are hundreds of similar manifestos being written by like-minded racist jerk bags every single day. Taking down Breivik's manifesto, even if that's possible, which I'm sure it isn't, wouldn't do anything to staunch the tide of crap being vomited out by Stormfront or any other racist website. Trying to suppress them isn't going to change their minds either.
Racism is born from two things: 1) Ignorance and 2) Poverty. Look at your average White Supremacist (or any sort of racial supremacist for that matter) in the 21st century - chances are they're dumb, uneducated and bitter about whatever loser job they have. Studies have shown that the poorer a community is, the more likely they are to be racist, as they have to turn to "race pride" has a means of inflating their self-esteem - the racist takes pride in his or her race, because god knows they can't take pride in their job flippin' burgers at Wendys.
I'm not saying that racism is entirely due to society - humans are illogical and we might have a built in, illogical, tendency towards racism (it would explain why racism and tribalism crops up as a problem in every single society that has EVER existed throughout the history of humanity). But I am saying that the extremes of racism can be caused by society, and that the best way of fighting racism is not censorship - it's EDUCATION.
If anon really wants to fight racism, they should do the following: Donate to an educational charity. Write anti-racist blogs. Expose the logical flaws in Breivik's manifesto. Don't fight words with censorship - fight words with words. If Breivik's manifesto is really as illogical as we say it is, we shouldn't be afraid of it. We should challenge it using logic and reasoning and good ol' fashioned values of tolerance and respect for all peoples.
I sympathize with what Anon is trying to do (for once), but in typical "I'm-a-15-year-old-shut-in-with-no-understanding-of-society-and-I-have-no-real-clue-what-I'm-doing" fashion, they are going about it ENTIRELY the wrong way.
You want to ensure the tragedy in Olso doesn't happen again? It starts with talking to people. It starts with communicating anti-racist messages. It starts with teaching people about the genetic evidence that PROVES humans are all one species. It starts with countering the hysterical subtlety racist nonsense you find in Tabloids with reason and compassion and humanity.
Giving a copy of "Race and Reality: What Everyone Should Know About Our Biological Diversity" By Guy P. Harrison, to your local school or hell, your next door neighbour or your family members, as a gift, would do far, far, far, far, far, far, far more to combating racism than launching an "attack" against a manifesto already derided by mainstream society. Breivik's manifesto is a mess of illogical, specious claims - it's actually quite well written from a grammatical perspective, Breivik obviously knew his English - but the actual content is sexist, racist, unscientific, emotional, paranoid garbage.
The best thing we can all do about Breivik is to IGNORE HIM. He obviously wants to go down in History as a Martyr to some deranged cause. He wants, and believes, that his name will be revered in households 60 years from now across Norway. Let's prove him wrong, and the first step is to forget his name.