SFO's claim of the first northern Californian full-Wi-Fi-access airport is trumped by San Jose: San Jose's service, operated by Wayport, has been running for four years throughout all terminals. It's a much smaller airport than San Francisco International (SFO), which T-Mobile has unwired.
The story notes that T-Mobile is handing out free access cards, but misses the boat by stating that T-Mobile and Wayport require these cards for access. In fact, you can sign up for both services on the spot for single-day sessions the last time I used either using a gateway page and a credit card.