As you can see, I've managed to get it working, but it's still not to my satisfaction. For one thing, the lawnmower post is showing digg information for the Sam Hornish post. The Digg button also seems to look a little...hinky.
So, if anyone out there knows a good way to get the button I want working, please leave a comment with your suggestions!
Update: Well, I found a different set of instructions, and got the look I wanted, but now I'm not sure I like it. I may go back to including a simple digg graphic in the footer of each post. Opinions?