The really first contact with wearable computing for me was in Zurich, Switzerland when the Expert from the ETHZ presented his idea for a PHA - the Personal Health Assistant. Looks like we are a bit closer to that idea now:

In future, a smart sensor network will monitor sufferers and alert the doctor when necessary

Six Fraunhofer Institutes in Germany have spent two years working on a system that can record the main cardiovascular functions 24 hours a day over a long period of time, even away from the doctor's office, and enables communication with qualified medical staff.

The technology will be presented at the CeBIT, Fraunhofer, Hall 9, Stand B36.

Via Smart Economy: Smart Mobile health assistant

Picture Source here