Like to know how you can do this ? --- I can only find the option in (display) to chose which items to check for a notification. The only option is for the "trackball" to light up. No options to use "LED" for notifications
The only time I've seen an option for changing the color of the LED is in Handcent, it has options for red, blue, etc, though people on this forum have said that it doesn't work that way on the Eris, since the Eris only has green and orange.
Some have said that the Moto Droid supports multi-colored LED, but I don't know that for sure.