If you found your Internet surfing coming up empty in recent days, it's possibly part of one of the biggest cyberattacks experts have seen. A non-profit that fights junk email has been getting clobbered for days. Spamhaus had blacklisted a web hosting company in the Netherlands for allegedly helping to spread spam. The Dutch company called Cyberbunker didn't like getting blacklisted and the result is clogging things all around the Internet.