Web surfers who spend their days at Starbucks will start noticing a difference in the coffee chain's Wi-Fi service, as it begins the nationwide rollout of AT&T Wi-Fi. The two announced back in February that AT&T would be replacing T-Mobile as Starbucks' wireless Internet partner.

Also, qualifying AT&T broadband customers will have free Wi-Fi access at some 7,000 company-owned Starbucks locations.

And, of course, iPhone and iPod touch owners have free wireless access to iTunes from participating Starbucks stores as well.