I guess I won't miss it too much. I have used it only once so far, so let my (then) girlfriend know that I was on my way to SEA from DFW...I completely forgot to mention that to her before my trip...
The ONLY other time I've seen someone using JetConnect was a IAH-PIT US Air flight, where someone spoke for 2+ hours continuously

. He was basically summarizing an earlier meeting, and everyone in earshot fully understood his company's business model, proposal, technical merits and drawbacks of the proposal, his company's future projects, his upcoming travel schedule, his secretary's name and email address, and finally, his Dividend Miles number