Other than the fact that they are expanding the routes on which this is offered, I'm not sure how this is new news. Gogo has been offering service on trans-con American Airlines flights from LA to the east coast for at least 6 months now.
I've used it a few times, and it works OK. Speeds were reasonable (100-150KB download speeds, ping times comparable to mobile broadband, 150-200ms) and I think there was only 1 dead spot for a few minutes during the times that I was logged in. They did not block VPN access so you could conceivably use VoIP once you VPN, but I did not try this.
A link to the actual service (rather than USA today or a blog) would help too:
Aren't we having a zinc shortage? Get it from these fingers!!
In the realm of scientific observation, luck is granted only to those who are prepared. - Louis Pasteur