What happened? Beginning Thursday evening, Typepad was hit with a distributed denial of service (DDoS) off and on through today. A DDoS attack is an attempt to make services unavailable, but in no way was your Typepad account compromised. All information in your Typepad account is secure, including billing information. The attack on Typepad was similar to an attack on Basecamp which you can read about here.
Funny, being in a haze of chocolate bunnies, I didn't even notice the blog was down until I got an email Tuesday morning.