Ever seen our Gujjus made the coffee at Dunkin Donuts virtually non-potable, we’ve dropped anchor at Starbucks for our Caffeine fix.

Now, there’s one more reason Starbucks is better than Dunkin Donuts: AT&T is offering free Wi-Fi to iPhone customers at Starbucks.

Since we occasionally use the iPhone to process comment or make brief posts on this blog, the free Wi-Fi at Starbucks should come in handy for us.

Here are the verbatim instructions from AT&T to get your Wi-Fi going on the iPhone at Starbucks:

* Activate Wi-Fi from the settings icon on your iPhone
* Select “attwifi” from the list of available networks
* Enter your 10-digit mobile number and check the box to agree to the Acceptable Use Policy. Tap ‘continue’
* You will receive a text message from AT&T with a secure link to the AT&T Wi-Fi hotspot. You will not be charged for the text message.
* The SMS link will only be valid for 24 hours at the location it was requested. Another request must be submitted when using another hotspot location.
* Open the text message and tap on the link for 24-hour access to the AT&T Wi-Fi hotspot.
Source: AT&T

Besides Starbucks, iPhone users can also get free Wi-Fi at the Barnes & Noble book stores.

Meanwhile, comScore has put out a report today stating that the strongest growth in iPhone users is coming from lower-income households.

Here’s what comScore’s saying in the All about iPhone report:

iPhone adoption since June 2008 rose 48 percent among those earning between $25,000 and $50,000 per year and by 46 percent among those earning between $25,000 and $75,000. These growth rates are three times that of those earning more than $100,000 per year. Overall, iPhone penetration grew 21 percent.