The only other animations (aside from ad banners) I can think of are the smilies. I'm just going to be keeping it simple this time around. To animate some clouds passing over the moon there would require A LOT of frames and a loss of color definition due to the nature of a 256 color animated gif. I know that PNGs can be animated now, but it's still not supported in all browsers.
Plus, I find animated gifs to be sort of distracting, and anything that can distract from the actual content of the site is no good in my eyes. I've always been all about content over flashy graphics and flash animations.
I think the house has (pretty much) already won out in my head. I may add some bats over the house, but otherwise, that's more or less what I'm going with.