Madshrimps:

Maybe it’s because I work as a reporter, but it seems to me that secrets are overrated. I suspect that so often the cost of keeping secrets is greater than whatever benefit they bring. You may disagree. But there’s one thing that should be clear_ if you want to keep a secret, you shouldn’t post it on the Internet.

That brings us to the odd case of AT&T and its free Wi-Fi for iPhone users. Last week, several iPhone owners reported to the MacRumors blog that they were offered free Wi-Fi service at hotspots run by AT&T at Starbucks and Barnes & Noble. A few days later, the free access was cut off.

http://bits.blogs.nytimes.com/2008/05/09/atts-wi-fi-tease-for-iphone-users/?ref=technology