http://www.crcweb.org/starbucks_list.php
Chicago Rabbinical Council
Guide to Starbucks Beverages
February 2011
Starbucks shops serve many kosher and non-kosher items, with the most
serious non-kosher item being hot meat sandwiches. The standard daily
clean up at Starbucks includes a hot wash of all utensils and some
parts of that washing are done without soap. This clean up process
significantly challenges the kosher status of the otherwise kosher
products and each product must be judged by a competent halachic
authority. The cRc will be printing a detailed review and analysis of
this topic in the upcoming edition of The Journal of Halacha and
Contemporary Society, and that article will subsequently be available
on the cRc website.
The good news is that there are many Starbucks locations that do not
serve hot meat sandwiches. These are generally the Starbucks kiosks
that can be found in airports, department stores, supermarkets, etc.,
and at these locations the cRc is comfortable recommending any drink
made from kosher ingredients (even though some others use ingredients
that may not be kosher).
This list is accurate at this time for stores in the United States,
and does not address toppings and other items added to beverages.
Since the information on this list is subject to change, this list
should not be used after June 30, 2011.
Note: I just tried this link and it does not work, but it worked earlier. Strange. This link from Google is also broken.