[He previously founded and ran the Boston-based Institute for Health Improvement].
Hastings, currently chief executive officer of NetFlix.com, previously founded Pure Software.
Poole previously founded the site that has come to represent the Internet's id.
He previously founded Second Market, which facilitates trades in private company stock, among other assets.
Spivack previously founded Radar Networks, a company focused on semantic Web technology.
The pair previously founded New Line Cinema, which released Peter Jackson's Lord of the Rings trilogy.
The agencies that Mr. Tierney previously founded include Tierney Communications and the T2 Group.
Channel Mum Founder, Siobhan Freegard, previously founded the UK's biggest parenting website, Netmums.
Clark had previously founded and been chairman of Silicon Graphics, Inc., a manufacturer of computer workstations.
Mr. Tannen, 38, previously founded a video game company and worked in the marketing departments of Wrigley and Kraft.
Gabriel is a serial entrepreneur who previously founded other Internet-related companies; he is also an active angel investor.
