Super Chat or Cross Media Communications? Jupiter Media Metrix reports that the total time using instant messaging jumped 110% at work and 48% at home over the same time last year. The recently released report shows that that the total number of minutes spent at work in the US (using the top three brands of instant-messaging applications) jumped: - from 2.3 billion minutes in September 2000 to 4.9 billion in September 2001. The number of unique users of instant-messaging applications at work increased 34%: - from 10.0 million in September 2000 to 13.4 million in September 2001. The …