I recently wrote up and uploaded a pdf to Ravelry for a top-down hat pattern/recipe that I've been toying with for a couple years.
The link: Top Down, No Swatch Hat
Here's a pic of the most recent hat I made.
Several of my first attempts used Judy's Magic Cast On at the top, but I didn't like the tight line it made with yarns thicker than fingering weight. So, the solution was a simple long-tail cast on that is closed up with the tail yarn when you're done.
I've also made a few double-layered hats with this recipe. For that variation, you just double the amount of ribbed cuff, repeat the plain stockinette section, then reverse the shaping by doing mirrored decreases. Finally finishing off by grafting. Here's a link to my Flickr pic showing one of these hats. I can't find the file to upload it here...it must be on my old PC...