Anonymous takes down several websites over shutdown of Megaupload.com
In response, the loose knit hacker collective “Anonymous” has organized a protest using a brute force method of flooding a website with so many requests it falls under its own weight, a tactic they call a LOIC (low orbit ion cannon) or DOS attack (denial of service).
The victims of their attack so far: the Department of Justice, the RIAA, MPAA, and Universal Music. As of the publishing of this post, only the MPAA had regained its footing and the other sites remained inaccessible.
The FBI issued this press release about the Megapupload arrests.