“In the Studio” at TechCrunch TV continues today with a guest who was once a Senior Scientist at Apple and CEO of Mozilla Corporation before eventually making the trek up Sand Hill Road, where today he's a partner at a leading venture capital firm. John Lilly, an investor with Greylock Partners, has kept himself busy. Having invested already in properties like Tumblr, Dropbox, and a series of others through his firm's early-stage "Discovery Fund," one of the new areas Lilly is investigating today is world of personal health data and systems. The sheer number of new companies and devices on the market offering consumer-level health solutions is simply staggering. We have an explosion in "computing devices" (phones and sensors), new hardware (like Fitbit), new software services (like Cake Health), and social systems and platforms that attempt to weave these all together to form some type of personalized representation of our current state of health and where we'd aspire to be. (Note: There are simply way to many companies in the health space to mention them all here. You can find more comprehensive lists on Quora and by poking around the website of Rock Health, an incubator designed to help launch health-focused startups.)