I noticed something interesting today at Sam's site... He trackback's posts on his own blog.
I'm sure that's not what's really happening, as most of the technical side of Sam's site is way over my head. He's probably just merged categories and trackbacking in some fashion, so as to create a web of posts. By viewing on post and it's comments, you can find other similar posts that he's written that relate. It never occured to me that it might be worthwhile to trackback other posts on my own site... Hmm...