Btw, the IP I was surfing from was 216.65.237.211, which is part of the block reserved by Boeing for its Connexion customers:
IP Location: United States United States - Washington - Seattle - Connexion By Boeing Commercial Airline Customer
Connexion by Boeing CONNEXION-BY-BOEING (NET-216-65-224-0-1)
216.65.224.0 - 216.65.255.255
Connexion by Boeing Commercial Airline Customer COM-AVI-1 (NET-216-65-237-0-1)
216.65.237.0 - 216.65.239.255
# ARIN WHOIS database, last updated 2005-02-26 19:10
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The IPs trace back to Internap Network Services, the very same company who also serves Mobileread.com

In the case of Connexion, Internap connects to satellite ground stations in the U.S. and Asia through its private network access points (P-NAPs) in Denver, Seattle and Tokyo. From each P-NAP, Internap then provides its high performance Internet service to support two-way satellite broadband for Internet access, data and entertainment programming to aircrafts operating in these regions.