I read the whole thing through thinking "this doesn't sound like Dustin." I not sure I understand the custom of guest blog entries.

Why doesn't Mr. X publish this on his own blog? It's a decent article -- why not build up his own blog's reputation? Is he trying to reach a wider audience by pulpit-hopping? I was more inclined to click on the link because I saw the domain name and usually like Dustin's blog entries, so is Dustin leveraging his brand or just diluting it?