Yes, Virginia, these do exist.

One of my ex-classmates works for a materials research company, and he has a homemade keychain with a blue LED on it.

Another ex-classmate works for a firm that makes a kind of custom computer for determining protein structures. They put about $250 worth of blue LEDs (in other words, about 20) on their product because marketing said it would look cooler that way.

Once we figure out how to manufacture blue LEDs as cheaply as their red and green cousins, we will be able to make 60" HDTVs that are brighter and sharper than plasma screens, are only half an inch thick (or maybe even flexible), weigh less than 50 lbs, and cost under $300. Power consumption issues will probably still keep us with TFT displays on our laptops, though.