MySQL Database Failure [resolved]

A database failure caused a partial outage of the following sites:

http://www.internal-med.org/ - blog and registration code failure
http://www.ramaraksha.com/ - complete outage
http://www.phataks.com/ - outage of blogs

The database failure lasted from 1500 PDT to 2030 PDT - a 5:30 hrs unexpected downtime.
All systems are currently operational. We are sorry for the inconvenience