Kerry Ritz becomes CEO of push-to-talk voice and instant message startup Palringo, leaving the post of UK MD for Vonage. Trutap has appointed Wireless Industry Partnership (WIP) CEO Caroline Lewko to its board as a non-executive director. Kerry Ritz becomes CEO of push-to-talk voice and instant message startup Palringo (via Paidcontent). Webjam – a London-based European competitor to Ning – has appointed John Eikenberry as its new CTO, former CTO for Lycos-Europe.