s9y + s4y = phly
So, I did a little experimentation, and I was able to seamlessly integrate Serendipity into my existing website via Smarty, some CSS, and changing just a couple of links!
The result is the website you're currently reading!
This means I can now offer trackbacks, comments, RSS feeds, and all the other stuff a modern blog should offer… and with minimum fuss and with a lot of standards and security. I wish everything I did was this easy.