If you've noticed the intermittent outages since Thursday of last week and the total outage for the last several days, it's not because I took a vacation. The blog hosting service I use--Typepad--claims to have the victim of a major DDoS attack.
All I know is that getting the service up and running has taken far too long. Typepad should have had better defenses in place (it's not like this is the first DDoS in history), better options for dealing with an attack, and sufficient staffing to get the system up faster. When Basecamp went down to a similar DDoS, it was back up in about 3-4 hours.