I didn't want to encroach upon Bill's thread of fall colors and mine can't really compare anyway. Although autumn has finally arrived in my part of the world, the colors of my Japanese maples are just now starting to change. Here are a few of the early ones.
#1 and #2 are 'Glowing Embers'
#3 and #4 are 'O isami' (not an acer palmatum)
#5 is 'Sharp's Pygmy' just starting to change color.
Edited to add that the pictures didn't upload in the order I thought they would. #1 and 3 are Glowing Embers now and 2 and 4 are the O isami.