Based on the following comments, lifted directly out of the blog, the initial service doesn't sound too robust.
"I started this blog from my middle seat at 33-thousand feet with both my MacBook and iPhone tethered to the internet as we speed toward the Texas Gulf Coast."
Where and when did you finish and publish it?"
"The system was working overtime to keep up but as soon as it kicked in so did we and..there was no looking back for the Customers onboard. I managed several e-mail replies and letters during the 44 minute flight."
Again, the language does not suggest an easy interface with the net.
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