That's cool.
Did you count only the banner though or something, cause I've counted around 20ish :S... but thats for the whole site (not counting banners in the news box)
Though, you may have hand counted them...I just took a screen shot
But this is actually a good idea...would be fun to use for the palette challenge
EDIT:
I noticed I didn't get the second bg color for posts....and also, my colors may be off slightly due to the color changes when I saved it as .gif....