Bush no longer "miserable failure": Google tackles googlebombs

Search Engine Land's Danny Sullivan says,
After just over two years, Google has finally defused the "Google Bomb" that has returned US President George W. Bush at the top of its results in a search on miserable failure. The move wasn't a post-State Of The Union Address gift for Bush. Instead, it's part of an overall algorithm change designed to stop such mass link pranks from working.
Link, more here and here.