Google moved to curb Google bombs by tweaking their formula for ranking pages by relevancy. The changes limited the ability of relatively small groups to create Google bombs, but it did not end it entirely. Learn more about Google bombs.
In a bungled effort to dodge the Google bomb, the White House moved the Bush biography to a non-permanent URL that would apply to any seated president. This means that Obama or any other seated president should avoid the words "miserable" or "failure," or the Google bomb may kick into effect again.