All at 800x600, this being the size of my monitor. Click to pop up a full-screen version.
And some tiled ones.
AIM Buddy Icons
If you have AOL Instant Messenger, you can use these images as the pic your Buddy sees when chatting with you. Left-click the picture; if you have AIM running it should install automatically. If it doesn't, you need to download the picture and save it in the folder AOL Instant Messenger/AIM Files/Buddy Icons. You can then choose it from the list of icons when you run AIM.