Basic Cardigan: Two Ways (Zipper and Buttons)
This pattern is published in KNITS MEN WANT, which will be available April 1st 2010, but can be preordered any time before then.
The button version of this sweater is show in wool while the zipper version is shown in Rowan Yarn Cotton Jeans. It comes written for all the sizes listed above in multiple gauges from 3sts/inch to 6sts/inch. So you can make it in the yarn pictured and suggested or in any yarn you fancy.
The pattern includes schematics.