"Due to overwhelming interest in Card Rewards we are currently experiencing difficulty accessing Starbucks Card accounts. We are working to fix the problem and ask that you please try again later," said a page shown to site visitors, according to this IDG News Service story. A Starbucks spokesman said that the problems were on Starbucks' end, not AT&T's. "Customers overwhelmed the site when joining Starbucks Card Rewards," said Doug Cavarocchi, a Starbucks spokesman, in an e-mail.
Note to retailers looking to offer free Wi-Fi: It's a good idea to first make sure you can make the offer. Starbucks discovered that an offer of two hours of free Wi-Fi a day simply wasn't working.