This came to me on Daily Candy this morning. LA-based Succulent has announced the first phase of nationwide delivery. For $45 plus shipping & handling, they'll send one of these sweet locally-grown, pesticide-free plants in an artisan-made container. Packaged with recycled/repurposed materials... I'm a sucker for repurposed.
I know I'm obsessed with little green things right now. But this would make a classy thank-you, and would last a lot longer than a bouquet of flowers. (Succulents are almost impossible to kill, I know from experience!)