I'm now making another attempt to make better debian packages of my own projects and customizations of existing packages... starting with Wordpress.
I'll start with a debian source package, modify it, then make the package and install it. :-)
UPDATE March 13, 2008: I actually started with php-cache-lite and used the guts to create a nexista package. I think this is the first real debian package I've created! Here are my notes on doing so.