So this is not Black Monday - at least not yet - but it is Tech Monday. We talk about technology at the beginning of each business week. And today two tech giants are getting into the online medical records market. Google and Microsoft have announced services that will let you store your medical information on a single, centralized, Web-based service. Cyrus Farivar reports. CYRUS FARIVAR: Every time you change doctors, it can be hard to bring your medical records along with you. That's why Microsoft started its new free service, HealthVault, which hopes to change all that. Users can upload lab results, fitness records, and hospitalization summaries to the site. However, Liz Boehm, an analyst at Forrester Research, explains that the health care industry changes very slowly. So the...