I've had confirmation from a respected source at CNNI that flagship programme Insight has indeed disappeared from the schedules...for the time being. Instead of a 30-minute weekday programme, Jonathan Mann has been appearing on other programmes such as Your World Today, providing short in-depth reports which would usually have appeared within the Insight programme. He has also appeared on other CNN networks such as Headline News.
I'm told this is an experiment to replace Insight with a series of shorter reports repeated throughout the news day on CNNI. A final decision has not been taken on the programme or these segments.