How about having a website where you can customize your cup of Starbucks coffee as you like (hopefully intuitively with lots of visual aids) on your PC, mobile or PDA and SEND it to your favorite Starbucks store? You just go to the store and tell your number given in the website, and the clerk says “OK, you pre-ordered ‘Grande Add shot Caramel Light Whip Caramel Sauce Mocha Sauce White Chocolate Mocha Frappuccino’, right?” instead of your saying it. In the website, you see other customers’ choices, suggestions, tips for your choice, rankings, etc. Some of those are already realized in the Japanese Starbucks website, but I believe they can add some Amazon-like features to it. It’s wiin-win-win situation for you, Starbucks and other customers.
Hm, sounds a lot like this:
http://www.macrumors.com/2007/12/27/buying-to-go-items-with-your-iphone/
Do Apple people read your blog? 😉