I wondered how long before this would take place. Most major races now use RFID chips and your time is registered at various checkpoints for results and verification.
I didn't think it would be hard to create alerts or transmit this data to interested parties.
HP technology takes every step at 2005 Boston Marathon .
NYSE:HPQ - News; Nasdaq:HPQ - News) today announced that it is providing the technology to track every registered participant at the 109th running of the Boston Marathon, the world's oldest annual marathon, and plans to make race information instantly available to fans, friends and family worldwide via the Internet.
The system allows runners to register up to six mobile or Internet email addresses for delivery of alerts from four checkpoints on the course: 10K, half marathon, 30K and the finish.