The site interface is nice and clean and doesn’t require you to sign up to any mailing lists or do anything more than a simple registration. From their privacy policy:
We will not modify, copy, distribute, transmit, license, sell or redistribute any of your personal profile information.
Has anyone else booked with Airfare or have any good discount sites they’d like to share? Had my travels been solely within the US I would have given Skybus a chance.