I did some searching on the web today and found a bunch of stuff:
BIG 1157 LED bulbs brighter than regular 1157's. (with review)
Helmet mounted 3rd LED brake light.
Review of above product.
Same site as above, tons of LED products for bikes.
All kinds of LED stuff, even MR16 replacement bulbs and non-automative stuff, CHEAP. (they even sell single bare LEDs)
I'm going to do a how-to article on installing some headlight accents on my F-150
from these guys.