Aer Lingus launched their in-flight wifi service on Monday.
The service is available on their A330 fleet on transatlantic routes.
Pricing is comparable with that offered by other airlines on similar routes:
€10.95 for one hour or €19.95 for 24 hours access in Economy class.
Business Class customers apparently get the service for free (though they’re paying substantially more for their seats!)
By comparison US GoGo charges USD$14 for 24 hours access, though the service is currently only available on domestic routes in the US.