How to get free Wi-Fi @ Gizmodo  (overview)

Some codes and an excerpt from this post @ My Money Blog:

Here are some promotional codes that will provide you with one free session of GoGo. They are good once per account. However, supposedly you can sign up with any name and any e-mail address with no confirmation system (no credit card needed either with the code), it seems like they are pretty much offering unlimited free internet until these expire. I hope I can get it to work! Via FlyerTalk.

Expire 12/31/2009
DELTATRYGOGO
AIRTRANTRYGOGO
AATRYGOGO

Expire 1/7/2010
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2285632980tlk