Where can these be used. My first guess was of course — fruitcakes. I checked the MINTEL Global New Products Database (GNPD). I found 150 fruit cakes and about half in North America. Almost all include glace cherries. No blueberries to be found. Except for our friends in Trinidad and Tobago who produce a wonderful product with dried blueberries.
To a pastry chef the plump glace blueberry can be used as a cake decorating or topping. This may a bit far out, but glace blueberries could be used in bar drinks as a garnish like maraschino.
So far, I have found two suppliers in North America. If you are interested send blueberry guy a note and I will point you in the right direction: