Fierce Network Broadband Nation Expo Fierce Technology Events Sensors Converge Advertise About Us Broadband Cloud Wireless Resources Fierce Events Podcasts Surveys Webinar Whitepaper Events Subscribe Broadband Cloud Wireless Resources Fierce Events Podcasts Surveys Webinar Whitepaper Events Subscribe Fierce Network Broadband Nation Expo Fierce Technology Events Sensors Converge Advertise About Us Special report: Take the AI & Automation Survey Wireless SPOTLIGHT: Loopt exec leaves for Charles River post Oct 8, 2007 6:59am Loopt's Mark Jacobstein has left the mobile location-based services company for a post at Charles River Ventures. Article