Michael Schwartz, ex-Communications Daily, steps down from CableLabs senior...

Michael Schwartz, ex-Communications Daily, steps down from CableLabs senior vice president-communications, to become consultant … Brent Rosenthal, W.R. Huff Asset Management, becomes Rentrack non-executive chairman, succeeding Paul Rosenbaum, retiring; CEO Bill Livek becomes vice chairman … Owen DeLong, Hurricane Electric, joins advisory board for Infoblox IPv6 Center of Excellence … Informa Telecoms & Media hires Nick Thomas, ex-Forrester Research, as principal analyst, covering TV and digital media … Amy Storey promoted to assistant vice-president, public affairs, CTIA.