According to SeatGuru, VS has Empower ports on its 747s and A340s, in the Upper and Premium Economy cabins (no power in Y).
If you use a device such as the iGO Everywhere MAX (which works with Empower), the extension that comes with the MAX can be fitted with tip # A133, which supports the EyePhone and other Apple corp. products:
http://www.amazon.com/Mobility-iGo-A.../dp/B001678KO4