According to slashfood there are some interesting new flavors of Frappuccino coming out.

Blackberry Green Tea Sounds pretty good eh?

Starbucks has a few new drinks in the works for this summer. Actually, the company is always testing new
drinks in different parts of the country. Some are limited release - like macchiatos flavored with maple in the North
East and coconut mocha in Hawaii - and others are destined, if successful, to be part of a much larger rollout. Creme
Brule and Blackberry Green Tea are flavors supposedly to be released at the end of spring and Starbucks is
experimenting with soy based Frappuccinos for non-dairy drinkers. The Green Tea Frappuccino is said to have blackberry
puree or syrup, similar to the one added to the Strawberries and Cream frappuccino,  added to the base and the
drink will be topped with a blackberry drizzle